message: build: cleanup bazelignore file
  These folders are no longer used in the source tree, and only exist
  in the Bazel sandbox. We can rmeove them. Node modules are kept because
  people may create them when editing the integration `package.json`
  files.
  PR Close
diff: @@ -9,7 +9,6 @@ aio/node_modules
  aio/content/example-playground
  aio/tools/examples/shared/node_modules
  aio/tools/examples/shared/example-scaffold
  -packages/bazel/node_modules
  # All integration test node_modules folders
  integration/cli-elements-universal/node_modules
  @@ -39,32 +38,3 @@ integration/side-effects/node_modules
  integration/terser/node_modules
  integration/typings_test_ts36/node_modules
  integration/typings_test_ts37/node_modules
  -
  -# All integration test .yarn_local_cache folders
  -integration/cli-elements-universal/.yarn_local_cache
  -integration/cli-hello-world/.yarn_local_cache
  -integration/cli-hello-world-ivy-compat/.yarn_local_cache
  -integration/cli-hello-world-ivy-i18n/.yarn_local_cache
  -integration/cli-hello-world-ivy-minimal/.yarn_local_cache
  -integration/cli-hello-world-lazy/.yarn_local_cache
  -integration/cli-hello-world-ts-47/.yarn_local_cache
  -integration/dynamic-compiler/.yarn_local_cache
  -integration/hello_world__closure/.yarn_local_cache
  -integration/hello_world__systemjs_umd/.yarn_local_cache
  -integration/i18n/.yarn_local_cache
  -integration/injectable-def/.yarn_local_cache
  -integration/ivy-i18n/.yarn_local_cache
  -integration/ng-add-localize/.yarn_local_cache
  -integration/trusted-types/.yarn_local_cache
  -integration/forms/.yarn_local_cache
  -integration/ng_elements/.yarn_local_cache
  -integration/ng_elements_schematics/.yarn_local_cache
  -integration/ng_update/.yarn_local_cache
  -integration/ng_update_migrations/.yarn_local_cache
  -integration/ngcc/.yarn_local_cache
  -integration/platform-server/.yarn_local_cache
  -integration/service-worker-schema/.yarn_local_cache
  -integration/side-effects/.yarn_local_cache
  -integration/terser/.yarn_local_cache
  -integration/typings_test_ts36/.yarn_local_cache
  -integration/typings_test_ts37/.yarn_local_cache
  