fix conflict

metagpt/base/base_role.py

@@ -1,13 +1,8 @@
-from __future__ import annotations
-
 from abc import abstractmethod
-from typing import TYPE_CHECKING, Optional, Union
+from typing import Optional, Union
 
 from metagpt.base.base_serialization import BaseSerialization
 
-if TYPE_CHECKING:
-    from metagpt.schema import Message
-
 
 class BaseRole(BaseSerialization):
     """Abstract base class for all roles."""