去除无效引入

src/main/java/com/uas/ps/message/service/impl/MessageServiceImpl.java

@@ -1,7 +1,5 @@
 package com.uas.ps.message.service.impl;
 
-import static com.sun.org.apache.xml.internal.serializer.utils.Utils.messages;
-
 import com.alibaba.fastjson.JSONObject;
 import com.uas.account.entity.User;
 import com.uas.account.entity.UserView;