message: Remove extraneous expand_nonconcat_dims from doc string of tf.sparse.concat
  This PR tries to address the issue raised in 45778 where the doc string
  of  tf.sparse.concat has an extraneous expand_nonconcat_dims arg.
  The expand_nonconcat_dims was the leftover of tf.v1.sparse.concat.
  This PR fixes 45778.
diff: @@ -429,7 +429,8 @@ def sparse_concat_v2(axis, sp_inputs, expand_nonconcat_dims=False, name=None):
  sparse_concat_v2.__doc__ = sparse_concat.__doc__.replace(
  - " concat_dim: The old (deprecated) name for axis.\n", "")
  + " concat_dim: The old (deprecated) name for axis.\n", "").replace(
  + " expand_nonconcat_dims: alias for expand_nonconcat_dim\n", "")
  @tf_export(v1=["sparse.add", "sparse_add"])
  