message: Bazel: Remove deprecated experimental_shortened_obj_file_path option
  `experimental_shortened_obj_file_path` is depreacted since [version `0.17.0`](https://blog.bazel.build/2018/09/14/bazel-0.17.html) and activated by default. Since Tensorflow requires [at least bazel `0.19.0`](https://github.com/tensorflow/tensorflow/blob/master/configure.py#L1559), this flag can be savely removed.
diff: @@ -1513,10 +1513,6 @@ def set_windows_build_flags(environ_cp):
  # The host and target platforms are the same in Windows build. So we don't
  # have to distinct them. This avoids building the same targets twice.
  write_to_bazelrc('build --distinct_host_configuration=false')
  - # Enable short object file path to avoid long path issue on Windows.
  - # TODO(pcloudy): Remove this flag when upgrading Bazel to 0.16.0
  - # Short object file path will be enabled by default.
  - write_to_bazelrc('build --experimental_shortened_obj_file_path=true')
  if get_var(
  environ_cp, 'TF_OVERRIDE_EIGEN_STRONG_INLINE', 'Eigen strong inline',
  