fix ruff

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

Author: MengqingCao

tests/e2e/multicard/test_offline_inference_distributed.py

@@ -24,9 +24,11 @@
 from unittest.mock import patch
 
 from modelscope import snapshot_download  # type: ignore
+
+import pytest
+import vllm  # noqa: F401
 from vllm import SamplingParams
 from vllm.model_executor.models.registry import ModelRegistry
-import pytest
 
 from tests.conftest import VllmRunner
 from tests.model_utils import check_outputs_equal