fix lint

Signed-off-by: MengqingCao <cmq0113@163.com>

Author: MengqingCao

tests/ut/kv_connector/test_mooncake_connector.py

@@ -11,7 +11,6 @@
 from unittest.mock import MagicMock, patch
 
 import msgspec
-import pytest
 import zmq
 from vllm.utils import make_zmq_path