update code

python/paddle/distributed/fleet/__init__.py

@@ -29,7 +29,6 @@ __all__ = [
 ]
 
 fleet = Fleet()
-_role_maker_ = fleet._role_maker_
 init = fleet.init
 is_first_worker = fleet.is_first_worker
 worker_index = fleet.worker_index

python/paddle/distributed/fleet/base/fleet_base.py

@@ -189,9 +189,6 @@ class Fleet(object):
                 paddle.distributed.init_parallel_env()
         return None
 
-    def _role_maker_(self):
-        return self._role_maker
-
     def is_first_worker(self):
         """
         Check whether the node is the first instance of worker.