message: Remove useless self-link and python version note.
  Fixes
diff: # limitations under the License.
  # ==============================================================================
  -"""Testing.
  -
  -See the [Testing](https://tensorflow.org/api_docs/python/tf/test) guide.
  -
  -Note: `tf.compat.v1.test.mock` is an alias to the python `mock` or
  -`unittest.mock` depending on the python version.
  -"""
  +"""Testing."""
  from __future__ import absolute_import
  from __future__ import division
  