I think they are actually bolted on. I do know for a fact if you remove them you will have to fill the holes behind them. I just don't remember if they are actually bolted or if a stud just sticks through them to make them straight when installing them.
Theyre double sided taped on, so they just peel off...but theres also 3 holes behing them, no bolts going through them though....thats how it is on my 94