Remove build_gallery tests (#74463)

* Remove build_gallery tests

* Re-add deploy_gallery.sh
diff --git a/dev/prod_builders.json b/dev/prod_builders.json
index 454d9b3..457086d 100644
--- a/dev/prod_builders.json
+++ b/dev/prod_builders.json
@@ -121,12 +121,6 @@
          "flaky": false
       },
       {
-         "name": "Linux build_gallery",
-         "repo": "flutter",
-         "task_name": "linux_build_gallery",
-         "flaky": false
-      },
-      {
          "name": "Linux build_tests",
          "repo": "flutter",
          "task_name": "linux_build_tests",
@@ -697,12 +691,6 @@
          "flaky": false
       },
       {
-         "name": "Mac build_gallery",
-         "repo": "flutter",
-         "task_name": "mac_build_gallery",
-         "flaky": true
-      },
-      {
          "name": "Mac customer_testing",
          "repo": "flutter",
          "task_name": "mac_customer_testing",
diff --git a/dev/try_builders.json b/dev/try_builders.json
index 30f8d11..56ad3a9 100644
--- a/dev/try_builders.json
+++ b/dev/try_builders.json
@@ -33,12 +33,6 @@
          "run_if":["dev/", "packages/flutter/", "packages/flutter_test/", "packages/flutter_drive/", "packages/flutter_localizations/", "bin/"]
       },
       {
-         "name":"Linux build_gallery",
-         "repo":"flutter",
-         "task_name":"linux_build_gallery",
-         "enabled":true
-      },
-      {
          "name":"Linux framework_tests",
          "repo":"flutter",
          "task_name":"linux_framework_tests",
@@ -221,12 +215,6 @@
          "enabled":true
       },
       {
-         "name":"Mac build_gallery",
-         "repo":"flutter",
-         "task_name":"mac_build_gallery",
-         "enabled":false
-      },
-      {
          "name":"Mac framework_tests",
          "repo":"flutter",
          "task_name":"mac_framework_tests",