移除警告

src/main/java/cn/teammodel/controller/admin/service/impl/AdminIndexDutyServiceImpl.java

@@ -211,7 +211,7 @@ public class AdminIndexDutyServiceImpl implements AdminIndexDutyService {
     @Override
     public Map<String, Object> getLessonRecord(LessonRecordDto lessonRecordDto, HttpServletRequest request) {
 
-        Map<String, Object> mapper = new HashMap<>();
+        Map<String, Object> mapper;
         String url = env.getProperty("ies.server-url");
         if(lessonRecordDto.isClassMeeting()) {
             List<School.Subject> subjects = schoolRepository.findSubjectById(lessonRecordDto.getSchool(), lessonRecordDto.getPeriodId());