message: Simplify loader_impl.py logic around main Op Tensor.
diff: @@ -232,13 +232,9 @@ def load(sess, tags, export_dir, **saver_kwargs):
  asset_tensors_dictionary = _get_asset_tensors(export_dir,
  meta_graph_def_to_load)
  - main_op_tensor = _get_main_op_tensor(meta_graph_def_to_load)
  + main_op_tensor = (_get_main_op_tensor(meta_graph_def_to_load) or
  + (_get_legacy_init_op_tensor(meta_graph_def_to_load)))
  if main_op_tensor is not None:
  sess.run(fetches=[main_op_tensor], feed_dict=asset_tensors_dictionary)
  - else:
  - legacy_init_op_tensor = _get_legacy_init_op_tensor(meta_graph_def_to_load)
  - if legacy_init_op_tensor is not None:
  - sess.run(
  - fetches=[legacy_init_op_tensor], feed_dict=asset_tensors_dictionary)
  return meta_graph_def_to_load
  