fix: improve maintenance and synchronize live conversations

backend/tests/api/test_file_upload.py

@@ -15,11 +15,9 @@ limitations under the License.
 """
 
 import pytest
-import os
 from unittest.mock import patch, Mock
 from fastapi.testclient import TestClient
-from fastapi import FastAPI, status
-from sqlalchemy.orm import Session
+from fastapi import FastAPI
 
 from app.api.file_upload import router, get_current_user_or_widget
 from app.models.user import User