Stale Privileges

Hi,

We are using vCenter 6.5 and registering our plugin that adds privileges to the privilege list. On unregistering the plugin, we still see those privileges remain on the vcenter, is there any way to completely remove privileges that remain on vCenter. This is more noticible if the privileges are updated in a newer versions, the old privileges remain though they are not going to be used. I have looked through logs, and files on vCenter after SSh'ing into it, but no luck. Is there any way to clean this up?

Thanks,