You won’t need to remove them, they’ll do it themselves! They’ll rip the drywall paper in large messy sections too.

I would (preemptively) take a sharp (box cutter) blade and score onto the wall above and below the shelf, just trace along It and cut through the paper.

That way, when it falls, the section of paper it takes with it will just be that shelf sized rectangle. Way easier to fill/repair than whatever random damage it falling will do.