message: Making the expiration date for old feature columns None.
diff: @@ -169,7 +169,7 @@ from tensorflow.python.util.tf_export import keras_export
  from tensorflow.python.util.tf_export import tf_export
  -_FEATURE_COLUMN_DEPRECATION_DATE = '2018-11-30'
  +_FEATURE_COLUMN_DEPRECATION_DATE = None
  _FEATURE_COLUMN_DEPRECATION = ('The old _FeatureColumn APIs are being '
  'deprecated. Please use the new FeatureColumn '
  'APIs instead.')
  