message: Cleaning up unused ESTIMATOR_API_INIT_FILES from api_gen.bzl
  Estimator code has its own copy of this file. This list is no longer
  needed in core tensorflow code.
diff: load("//tensorflow/python/tools/api/generator:api_init_files.bzl", "TENSORFLOW_API_INIT_FILES")
  -# keep sorted
  -ESTIMATOR_API_INIT_FILES = [
  - # BEGIN GENERATED ESTIMATOR FILES
  - "__init__.py",
  - "estimator/__init__.py",
  - "estimator/export/__init__.py",
  - "estimator/inputs/__init__.py",
  - # END GENERATED ESTIMATOR FILES
  -]
  -
  def get_compat_files(
  file_paths,
  compat_api_version):
  