The system table ScheduledEventInformation seems nearly useless, but it grows unnoticed with every execution of a scheduled event. This needlessly increases database size, with negative consequences to hosting costs and operation speed (slowdown of database back-up, restore, download and upload).
This happens in every app, see also https://forum.mendix.com/link/questions/8145. I have seen apps that have millions of records in this table. I think it is a waste of time to manually build a cleanup procedure for this silent space eater in every app.