I am a frequent user on quora.com, too. That site gets many things wrong, but there is a notification for any post of yours that got removed or "hidden" from public view. 

Which gives you the chance to either appeal that decision, or to improve your content. Most of the time, that is just a good information "do better next time", but it also allows you learn about unjust flags (my appeals are honored maybe 60 percent of the time). 

I remember my one and only suspension on stackoverflow.com, the mail said "flags are following you everywhere". Thing is: there were earlier warning mails that quoted specific examples (helpful), and I tried to adapt. I really thought "I am doing better". Thus I was a bit surprised when that suspension came up several weeks later. 

Note: I am not complaining about the suspension, it was okay and helpful. But I think: if the system would have shown me "dude, you got X comments flagged this week" , or "overall you got Y flags for being rude today", I think I would have reacted and changed behavior without that suspension. And: earlier, too. 

Thus: a system that *somehow* provides feedback on my content that got flagged, that could be very helpful. The system can count flags, and tell you the numbers, without putting any workload on overworked moderators!

I agree that there is no need in telling users about "no longer needed" flags, but some flags indicate negative feedback, and users might never hear about that. Because there content just gets deleted without the user knowing about it. And even if exact flag count isn't given, there could be other options, like an "traffic light" warning level "note, you entered red zone on *rude* flags, so better slow down immediately".