message: Removed param check for n in DCT.
diff: @@ -30,8 +30,6 @@ from tensorflow.python.util.tf_export import tf_export
  def _validate_dct_arguments(input_tensor, dct_type, n, axis, norm):
  """Checks that DCT/IDCT arguments are compatible and well formed."""
  - if n is not None:
  - raise NotImplementedError("The DCT length argument is not implemented.")
  if axis != -1:
  raise NotImplementedError("axis must be -1. Got: %s" % axis)
  if dct_type not in (1, 2, 3):
  