I was just browsing the tags and I noticed that the class tags for Diablo 3 still exist.
I don't feel like they are necessary. They are used sparingly nowadays. Even in general compared to the total amount of diablo-3 questions. Also we don't have class/role specific tags anymore on this site so I don't see why this should be any different in Diablo. They are also always used together with either the diablo-3 or diablo-3-console tags.
The main problem I see with the class tags are their inconsistency. There are a ton of diablo-3 class-related questions without the appropriate class tag but nobody bothers to retag them (and right now they are probably too many to do so manually).
So here's a suggestion to burninate all the Diablo-3 class tags since they are outdated and don't fit the tag scheme of this page anymore: