message: Remove deprecated/unused python related Bazel options.
  Since py_runtime was introduced, Bazel ignores options such as
  force_python2 and --python2_path. Deleting to clean stuff up and
  make sure people are not misled.
diff: @@ -226,8 +226,6 @@ def setup_python(environ_cp):
  # Set-up env variables used by python_configure.bzl
  write_action_env_to_bazelrc('PYTHON_BIN_PATH', python_bin_path)
  write_action_env_to_bazelrc('PYTHON_LIB_PATH', python_lib_path)
  - write_to_bazelrc('build --force_python=py%s' % python_major_version)
  - write_to_bazelrc('build --host_force_python=py%s' % python_major_version)
  write_to_bazelrc('build --python_path=\"%s"' % python_bin_path)
  environ_cp['PYTHON_BIN_PATH'] = python_bin_path
  