Remove unnecessary rbe env. variables

These variables will be available from config file downloaded from internal cipd from gn config.

LED to validate this doesn't affect existing CI: https://ci.chromium.org/raw/build/logs.chromium.org/flutter/led/keyonghan_google.com/535d7fc494bd42be52926b2d7f36a4715006d6002ab79ddf5df4dc75488dd716/+/build.proto?server=chromium-swarm.appspot.com

Change-Id: I30e51395a466c7762e01c2e8d1d8e2176ce774c9
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/54524
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Keyong Han <keyonghan@google.com>
diff --git a/recipe_modules/build_util/examples/full.expected/basic.json b/recipe_modules/build_util/examples/full.expected/basic.json
index 01748b3..e8b6f16 100644
--- a/recipe_modules/build_util/examples/full.expected/basic.json
+++ b/recipe_modules/build_util/examples/full.expected/basic.json
@@ -645,7 +645,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -676,7 +675,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -711,7 +709,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -744,7 +741,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -778,7 +774,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -812,7 +807,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -846,7 +840,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -880,7 +873,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -914,7 +906,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -948,7 +939,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -983,7 +973,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipe_modules/build_util/examples/full.expected/mac.json b/recipe_modules/build_util/examples/full.expected/mac.json
index c39636b..0468883 100644
--- a/recipe_modules/build_util/examples/full.expected/mac.json
+++ b/recipe_modules/build_util/examples/full.expected/mac.json
@@ -645,7 +645,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -676,7 +675,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -711,7 +709,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -744,7 +741,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -778,7 +774,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -812,7 +807,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -846,7 +840,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -880,7 +873,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -914,7 +906,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -948,7 +939,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -983,7 +973,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipe_modules/rbe/api.py b/recipe_modules/rbe/api.py
index 280f900..15467a3 100644
--- a/recipe_modules/rbe/api.py
+++ b/recipe_modules/rbe/api.py
@@ -96,7 +96,6 @@
     # the behavior of the build in a meaningful way.
     return {
         "RBE_service": "remotebuildexecution.googleapis.com:443",
-        "RBE_platform": self._platform,
         # Override default instance. Infrastructure uses different RBE
         # backends for different environments.
         "RBE_instance": self._instance,
diff --git a/recipe_modules/rbe/tests/full.expected/basic.json b/recipe_modules/rbe/tests/full.expected/basic.json
index 94c46a2..bea5a5a 100644
--- a/recipe_modules/rbe/tests/full.expected/basic.json
+++ b/recipe_modules/rbe/tests/full.expected/basic.json
@@ -43,7 +43,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -82,7 +81,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -121,7 +119,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -166,7 +163,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -212,7 +208,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -258,7 +253,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -304,7 +298,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -350,7 +343,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -396,7 +388,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -442,7 +433,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -489,7 +479,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -637,7 +626,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -676,7 +664,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -716,7 +703,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -761,7 +747,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -807,7 +792,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -853,7 +837,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -899,7 +882,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -945,7 +927,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -991,7 +972,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1037,7 +1017,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1084,7 +1063,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipe_modules/rbe/tests/full.expected/read_log_proto_failure_does_not_block.json b/recipe_modules/rbe/tests/full.expected/read_log_proto_failure_does_not_block.json
index 94c46a2..bea5a5a 100644
--- a/recipe_modules/rbe/tests/full.expected/read_log_proto_failure_does_not_block.json
+++ b/recipe_modules/rbe/tests/full.expected/read_log_proto_failure_does_not_block.json
@@ -43,7 +43,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -82,7 +81,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -121,7 +119,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -166,7 +163,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -212,7 +208,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -258,7 +253,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -304,7 +298,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -350,7 +343,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -396,7 +388,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -442,7 +433,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -489,7 +479,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -637,7 +626,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -676,7 +664,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -716,7 +703,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -761,7 +747,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -807,7 +792,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -853,7 +837,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -899,7 +882,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -945,7 +927,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -991,7 +972,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1037,7 +1017,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1084,7 +1063,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipe_modules/rbe/tests/full.expected/start_rbe_failed.json b/recipe_modules/rbe/tests/full.expected/start_rbe_failed.json
index 946c817..7496890 100644
--- a/recipe_modules/rbe/tests/full.expected/start_rbe_failed.json
+++ b/recipe_modules/rbe/tests/full.expected/start_rbe_failed.json
@@ -34,7 +34,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -66,7 +65,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -99,7 +97,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -133,7 +130,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -167,7 +163,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -201,7 +196,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -235,7 +229,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -269,7 +262,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -303,7 +295,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -338,7 +329,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipe_modules/rbe/tests/full.expected/stop_rbe_failed.json b/recipe_modules/rbe/tests/full.expected/stop_rbe_failed.json
index 8bc6767..e599d7e 100644
--- a/recipe_modules/rbe/tests/full.expected/stop_rbe_failed.json
+++ b/recipe_modules/rbe/tests/full.expected/stop_rbe_failed.json
@@ -31,7 +31,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -58,7 +57,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -88,7 +86,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -122,7 +119,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -156,7 +152,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -190,7 +185,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -224,7 +218,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -258,7 +251,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -292,7 +284,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -326,7 +317,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -361,7 +351,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe",
       "RBE_server_address": "unix://[CLEANUP]/rbe/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipes/engine_v2/builder.expected/basic.json b/recipes/engine_v2/builder.expected/basic.json
index 04662f1..9d9f6c1 100644
--- a/recipes/engine_v2/builder.expected/basic.json
+++ b/recipes/engine_v2/builder.expected/basic.json
@@ -1607,7 +1607,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1672,7 +1671,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1742,7 +1740,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1810,7 +1807,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1879,7 +1875,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1948,7 +1943,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2017,7 +2011,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2086,7 +2079,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2155,7 +2147,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2224,7 +2215,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2294,7 +2284,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipes/engine_v2/builder.expected/dart-internal-flutter-success.json b/recipes/engine_v2/builder.expected/dart-internal-flutter-success.json
index 2ebfb58..3de3ad1 100644
--- a/recipes/engine_v2/builder.expected/dart-internal-flutter-success.json
+++ b/recipes/engine_v2/builder.expected/dart-internal-flutter-success.json
@@ -748,7 +748,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -813,7 +812,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -883,7 +881,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -951,7 +948,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1020,7 +1016,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1089,7 +1084,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1158,7 +1152,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1227,7 +1220,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1296,7 +1288,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1365,7 +1356,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1435,7 +1425,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipes/engine_v2/builder.expected/mac.json b/recipes/engine_v2/builder.expected/mac.json
index 9640750..556867b 100644
--- a/recipes/engine_v2/builder.expected/mac.json
+++ b/recipes/engine_v2/builder.expected/mac.json
@@ -2002,7 +2002,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2067,7 +2066,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2137,7 +2135,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2205,7 +2202,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2274,7 +2270,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2343,7 +2338,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2412,7 +2406,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2481,7 +2474,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2550,7 +2542,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2619,7 +2610,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2689,7 +2679,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipes/engine_v2/builder.expected/monorepo.json b/recipes/engine_v2/builder.expected/monorepo.json
index 9a7055e..fe3fc3f 100644
--- a/recipes/engine_v2/builder.expected/monorepo.json
+++ b/recipes/engine_v2/builder.expected/monorepo.json
@@ -1536,7 +1536,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1598,7 +1597,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1665,7 +1663,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1730,7 +1727,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1796,7 +1792,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1862,7 +1857,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1928,7 +1922,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1994,7 +1987,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2060,7 +2052,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2126,7 +2117,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2193,7 +2183,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
diff --git a/recipes/engine_v2/builder.expected/monorepo_tryjob.json b/recipes/engine_v2/builder.expected/monorepo_tryjob.json
index 6858ca0..1f475d9 100644
--- a/recipes/engine_v2/builder.expected/monorepo_tryjob.json
+++ b/recipes/engine_v2/builder.expected/monorepo_tryjob.json
@@ -1623,7 +1623,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1685,7 +1684,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1752,7 +1750,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1817,7 +1814,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1883,7 +1879,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -1949,7 +1944,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2015,7 +2009,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2081,7 +2074,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2147,7 +2139,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2213,7 +2204,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",
@@ -2280,7 +2270,6 @@
       "RBE_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_log_format": "reducedtext",
       "RBE_output_dir": "[CLEANUP]/rbe_tmp_1",
-      "RBE_platform": "fake_rbe_platform",
       "RBE_proxy_log_dir": "[CLEANUP]/rbe_tmp_1",
       "RBE_server_address": "unix://[CLEANUP]/rbe_tmp_1/reproxy.sock",
       "RBE_service": "remotebuildexecution.googleapis.com:443",