1.课程的关联信息改成真删

2.修复一些bug

snowy-plugin/snowy-plugin-disk/snowy-plugin-disk-func/src/main/java/vip/xiaonuo/disk/controller/CourseNotebooksController.java

@@ -150,7 +150,7 @@ public class CourseNotebooksController {
         param.put("relateIdList", wllDelNoteIdList);
         List<CourseRelate> wllDelCourseRelateList=courseRelateService.wrapperList(param);
         List<String> wllDelCourseRelateIdList=CollStreamUtil.toList(wllDelCourseRelateList, CourseRelate::getId);
-        courseRelateService.deleteByIds(wllDelCourseRelateIdList);
+        courseRelateService.deleteByIdsReal(wllDelCourseRelateIdList);
 
         return CommonResult.ok();
     }