Deleting course report store in block "configurable_reports"

[fidanchik]

When deleting a course, the report is still present in the block configurable_reports (if you view it on the main page), although its status changes to "Deleted" and there is no way to delete it, when you try to click on any link in the report on the deleted course, an exception is thrown that the course has been deleted.
I think it is necessary to catch the course deletion event and then delete the corresponding report from the system.
The code does not implement a check for a deleted course.