优化代码，删除无效代码

plugins/point_trade/main.py

@@ -5,8 +5,7 @@ from typing import Dict, Any, List, Optional, Tuple
 import xml.etree.ElementTree as ET
 
 from db.connection import DBConnectionManager
-from db.points_db import PointsDBOperator, PointSource
-from message_util import MessageUtil
+from db.points_db import PointsDBOperator
 from plugin_common.message_plugin_interface import MessagePluginInterface
 from plugin_common.plugin_interface import PluginStatus
 from utils.decorator.plugin_decorators import plugin_stats_decorator