监考考试批次查询

themis-admin/src/main/java/com/qmth/themis/admin/api/SysController.java

@@ -447,7 +447,6 @@ public class SysController {
                     .in(TEExamStudent::getExamActivityId, teExamActivityIdList)
                     .in(TEExamStudent::getRoomCode, roomCodeSet);
             List<TEExamStudent> teExamStudentList = teExamStudentService.list(teExamStudentQueryWrapper);
-            Set<Long> examActivityIdSet = null;
             if (Objects.nonNull(teExamStudentList) && teExamStudentList.size() > 0) {
                 courseSet = new HashSet<>();
                 Set<Map> finalCourseSet = courseSet;