Fix imports

test/agentchat/contrib/test_swarm.py

@@ -1,7 +1,7 @@
 # Copyright (c) 2023 - 2024, Owners of https://github.com/ag2ai
 #
 # SPDX-License-Identifier: Apache-2.0
-from typing import Any, Dict, List, Optional, Union
+from typing import Any, Optional, Union
 from unittest.mock import MagicMock, patch
 
 import pytest