删除无效的引用

src/main/java/thyyxxk/webserver/dao/his/inpatient/ChargeListDao.java

@@ -7,7 +7,6 @@ import thyyxxk.webserver.entity.inpatient.chargelist.BriefPatInfo;
 import thyyxxk.webserver.entity.inpatient.chargelist.ChargeItem;
 import thyyxxk.webserver.entity.inpatient.chargelist.PatOverview;
 
-import java.util.Date;
 import java.util.List;
 
 @Mapper