message: Import `json` in `keras/layers/rnn.py`
  Summary: TF2.5 Only.
  Reviewers: #tensorflow, #framework_ip_review_-_any_oss_or_third-party_code_use_has_been_approved, samuelh
  Maniphest Tasks: T55261
diff: @@ -17,6 +17,8 @@ Recurrent Keras layers
  ~~~~~~~~~~~~~~~~~~~~~~
  """
  +import json
  +
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.framework import ops
  