chore: removing unused imports in tests (#9049)

api/tests/integration_tests/model_runtime/__mock/xinference.py

@@ -5,7 +5,6 @@ from typing import Union
 import pytest
 from _pytest.monkeypatch import MonkeyPatch
 from requests import Response
-from requests.exceptions import ConnectionError
 from requests.sessions import Session
 from xinference_client.client.restful.restful_client import (
     Client,