Ability to take off nametags from entities.

Surely if you are 'putting on' a nametag on an entity then you should be able to take it off. Especially since I find nametags are a pain to get so if you misplace one it's kind of annoying. Not only that but people may think they want to rename their chosen mob but to do this you need to make a new nametag. Why not be able to just take the nametag off the entity and rename it. It just makes so much sense I don't see why this isn't a feature.

Obviously, if a nametag is taken off an entity then they lose the name above their head.