Disable tests on RBE in Bazel's presubmit and postsubmit.

Bazel 3.4.0 broke something and now rbe_autoconfig fails somewhere inside Docker where it tries to start Bazel: https://buildkite.com/bazel/google-bazel-presubmit/builds/36688#262e09df-19ea-47cc-96bf-3c5a4e2d7352

This CL should be rolled back as soon as we figured out how to fix this.

The breakage is tracked in: #11756

RELNOTES: None.
PiperOrigin-RevId: 320977135

.bazelci/postsubmit.yml

@@ -205,15 +205,3 @@ tasks:
     include_json_profile:
       - build
       - test
-  rbe_ubuntu1604:
-    shell_commands:
-      - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/'
-        -e 's/^# android_ndk_repository/android_ndk_repository/'
-        -e 's/^# rbe_autoconfig/rbe_autoconfig/'
-        -e 's/^# load("@bazel_toolchains/load("@bazel_toolchains/' WORKSPACE
-      - rm -f WORKSPACE.bak
-    build_targets:
-      - "//src:bazel"
-      - "//src:bazel_jdk_minimal"
-    include_json_profile:
-      - build

.bazelci/presubmit.yml

@@ -195,45 +195,3 @@ tasks:
       - "--test_env=TEST_REPOSITORY_HOME=$OUTPUT_BASE/external"
     test_targets:
       - "//src:all_windows_tests"
-  rbe_ubuntu1604:
-    shell_commands:
-      - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^#
-        android_ndk_repository/android_ndk_repository/' WORKSPACE
-      - rm -f WORKSPACE.bak
-    build_flags:
-      - "--config=ubuntu1604_java8"
-      - "--remote_executor=grpcs://remotebuildexecution.googleapis.com"
-      - "--jobs=200"
-      - "--experimental_remote_download_outputs=minimal"
-      - "--experimental_inmemory_jdeps_files"
-      - "--experimental_inmemory_dotd_files"
-    build_targets:
-      - "//src:bazel"
-      - "//src:bazel_jdk_minimal"
-    test_flags:
-      - "--config=ubuntu1604_java8"
-      - "--remote_executor=grpcs://remotebuildexecution.googleapis.com"
-      - "--jobs=200"
-      - "--experimental_remote_download_outputs=minimal"
-      - "--experimental_inmemory_jdeps_files"
-      - "--experimental_inmemory_dotd_files"
-    test_targets:
-      - "//scripts/..."
-      - "//src/java_tools/..."
-      - "//src/test/..."
-      - "//src/tools/execlog/..."
-      - "//src/tools/singlejar/..."
-      - "//src/tools/workspacelog/..."
-      - "//third_party/ijar/..."
-      - "//tools/aquery_differ/..."
-      - "//tools/python/..."
-      - "//tools/android/..."
-      # See https://github.com/bazelbuild/bazel/issues/8033
-      - "-//src/tools/singlejar:output_jar_simple_test"
-      - "-//src/test/shell/bazel:external_integration_test"
-      - "-//src/test/shell/bazel:bazel_repository_cache_test"
-      - "-//src/test/shell/integration:java_integration_test"
-      - "-//src/test/java/com/google/devtools/build/lib/sandbox/..."
-      # See https://github.com/bazelbuild/bazel/issues/8162 (also disabled for local exec)
-      - "-//src/java_tools/buildjar/..."
-      - "-//src/java_tools/import_deps_checker/..."