fixed linting

extra/OpenWebuiTool/openwebui_tool.py

@@ -23,12 +23,8 @@ Requirements:
     - Lightrag
 """
 
-from pathlib import Path
-from typing import Optional, List, Dict, Union, Any
-from datetime import datetime
-
 # Tool version
 __version__ = "1.0.0"
 __author__ = "ParisNeo"
 __author_email__ = "parisneoai@gmail.com"
-__description__ = "Lightrag integration for OpenWebui"
+__description__ = "Lightrag integration for OpenWebui"