message: Delete meaningless comment.
diff: @@ -331,7 +331,6 @@ class MirroredExtended(distribute_lib.StrategyExtendedV1):
  self._communication_options = collective_util.Options(
  implementation=collective_util.CommunicationImplementation.NCCL)
  else:
  - # TODO(wxinyi): is this missing?
  self._communication_options = collective_util.Options()
  self._collective_ops_in_use = False
  self._collective_key_base = container_strategy._collective_key_base
  