优化代码，删除无效代码

plugins/video_man/main.py

@@ -3,7 +3,6 @@ import os
 import requests
 from typing import Dict, Any, List, Optional, Tuple
 
-from message_util import MessageUtil
 from plugin_common.message_plugin_interface import MessagePluginInterface
 from plugin_common.plugin_interface import PluginStatus
 from utils.decorator.plugin_decorators import plugin_stats_decorator
@@ -50,7 +49,6 @@ class VideoManPlugin(MessagePluginInterface):
 
         # 保存上下文对象
         self.event_system = context.get("event_system")
-        self.message_util: MessageUtil = context.get("message_util")
         self.gbm = context.get("gbm")
 
         self._commands = self._config.get("VideoMan", {}).get("command", ["猛男", "肌肉", "帅哥"])