Revert "Run malioc_diff.py in Linux Unopt"

This reverts commit 723fa987980dcec71e219f488b4c454f4b1cad77.

Reason for revert: malioc.json not found

Original change's description:
> Run malioc_diff.py in Linux Unopt
>
> Change-Id: I07e99da83cf1587bd95e7740289f84206e5938a4
> Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/38840
> Reviewed-by: Jonah Williams <jonahwilliams@google.com>
> Commit-Queue: Zach Anderson <zra@google.com>

TBR=zra@google.com,godofredoc@google.com,flutter-scoped@luci-project-accounts.iam.gserviceaccount.com,jonahwilliams@google.com

Change-Id: I66b9b1d348762ef5f191d1832841e3c8fdeac151
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/38880
Reviewed-by: Jonah Williams <jonahwilliams@google.com>
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Zach Anderson <zra@google.com>
diff --git a/recipes/engine/engine_unopt.expected/linux.json b/recipes/engine/engine_unopt.expected/linux.json
index 0991f12..0809b6c 100644
--- a/recipes/engine/engine_unopt.expected/linux.json
+++ b/recipes/engine/engine_unopt.expected/linux.json
@@ -1601,52 +1601,6 @@
   },
   {
     "cmd": [
-      "vpython3",
-      "-vpython-spec",
-      "RECIPE_REPO[depot_tools]/.vpython3",
-      "[CACHE]/builder/src/flutter/impeller/tools/malioc_diff.py",
-      "--before",
-      "[CACHE]/builder/src/flutter/impeller/tools/malioc.json",
-      "--after",
-      "[CACHE]/builder/src/out/host_debug_unopt/gen/malioc"
-    ],
-    "cwd": "[CACHE]/builder",
-    "env": {
-      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
-      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
-      "FLUTTER_PREBUILT_DART_SDK": "True",
-      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
-      "GOMA_DIR": "[CACHE]/goma/client"
-    },
-    "env_prefixes": {
-      "PATH": [
-        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
-      ]
-    },
-    "env_suffixes": {
-      "DEPOT_TOOLS_UPDATE": [
-        "0"
-      ],
-      "PATH": [
-        "RECIPE_REPO[depot_tools]"
-      ]
-    },
-    "luci_context": {
-      "realm": {
-        "name": "flutter:ci"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "malioc diff"
-  },
-  {
-    "cmd": [
       "python3",
       "[CACHE]/builder/src/flutter/tools/gn",
       "--goma",
diff --git a/recipes/engine/engine_unopt.expected/linux_lto.json b/recipes/engine/engine_unopt.expected/linux_lto.json
index afefab7..9915282 100644
--- a/recipes/engine/engine_unopt.expected/linux_lto.json
+++ b/recipes/engine/engine_unopt.expected/linux_lto.json
@@ -1600,52 +1600,6 @@
   },
   {
     "cmd": [
-      "vpython3",
-      "-vpython-spec",
-      "RECIPE_REPO[depot_tools]/.vpython3",
-      "[CACHE]/builder/src/flutter/impeller/tools/malioc_diff.py",
-      "--before",
-      "[CACHE]/builder/src/flutter/impeller/tools/malioc.json",
-      "--after",
-      "[CACHE]/builder/src/out/host_debug_unopt/gen/malioc"
-    ],
-    "cwd": "[CACHE]/builder",
-    "env": {
-      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
-      "FLUTTER_LOGS_DIR": "[CLEANUP]/flutter_logs_dir",
-      "FLUTTER_PREBUILT_DART_SDK": "True",
-      "FLUTTER_TEST_OUTPUTS_DIR": "[CLEANUP]/flutter_logs_dir",
-      "GOMA_DIR": "[CACHE]/goma/client"
-    },
-    "env_prefixes": {
-      "PATH": [
-        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
-      ]
-    },
-    "env_suffixes": {
-      "DEPOT_TOOLS_UPDATE": [
-        "0"
-      ],
-      "PATH": [
-        "RECIPE_REPO[depot_tools]"
-      ]
-    },
-    "luci_context": {
-      "realm": {
-        "name": "flutter:ci"
-      },
-      "resultdb": {
-        "current_invocation": {
-          "name": "invocations/build:8945511751514863184",
-          "update_token": "token"
-        },
-        "hostname": "rdbhost"
-      }
-    },
-    "name": "malioc diff"
-  },
-  {
-    "cmd": [
       "python3",
       "[CACHE]/builder/src/flutter/tools/gn",
       "--goma",
diff --git a/recipes/engine/engine_unopt.py b/recipes/engine/engine_unopt.py
index 8d422d8..a8cefaf 100644
--- a/recipes/engine/engine_unopt.py
+++ b/recipes/engine/engine_unopt.py
@@ -118,25 +118,6 @@
   )
 
 
-def RunMaliocDiff(api, out_dir):
-  script_path = GetCheckoutPath(api).join(
-      'flutter', 'impeller', 'tools', 'malioc_diff.py'
-  )
-  # TODO(godofredoc): use .vpython from engine when file are available.
-  venv_path = api.depot_tools.root.join('.vpython3')
-  args = [
-      'vpython3',
-      '-vpython-spec',
-      venv_path,
-      script_path,
-      '--before',
-      GetCheckoutPath(api).join('flutter', 'impeller', 'tools', 'malioc.json'),
-      '--after',
-      GetCheckoutPath(api).join('out', out_dir, 'gen', 'malioc')
-  ]
-  api.step('malioc diff', args)
-
-
 def BuildLinux(api, env, env_prefixes):
   RunGN(
       api,
@@ -152,7 +133,6 @@
   )
   Build(api, 'host_debug_unopt')
   RunTests(api, 'host_debug_unopt', types='dart,engine', suppress_sanitizers=True)
-  RunMaliocDiff(api, 'host_debug_unopt')
 
 
 def TestObservatory(api):