Hi there 
,
It would be useful a function or a button to remove the flags given to a user. It would be very useful also to the moderators.
I mean, when a user assigns a flag to another, this remains in the profile visible only to admin/mod. Exactly, it would be nice to delete these already assigned flags.
I’ll be working on this feature and give updates along the way via the MR 
A fix that tackles this issue partially has been merged - we now only count posts with standard flags that were approved in the flag counters. This should reduce the noise in those counters.
https://github.com/discourse/discourse/pull/22799