Look underneath. If the hitch is connected to frame at points other than just the back bumper it would probably be solid. If that is the case no harm in having it and it may be useful. If it's attached well I would just hit it with a can of black spray paint
to touch it up and keep my options open. If it is just bolted or welded to the back bumper probably better to remove if not going to modify to reach frame proper.
Lots of people have added bike racks and metal storage trays with bins made to go into a hitch receiver. You just have to use common sense about how much you put back there. And how far you extend out. Closer in to back wall works better than something sticking 4 ft. back.
If the hitch is solidly mounted no reason you could not put a couple of bikes on the back. Or a shelf with bin for "stuff" you want to have available but not in the camper.
You just want to avoid thinking that because the shelf says it can handle 500 lbs. or the hitch can handle a few hundred lbs. that putting that much weight
on the back of the trailer will be a good idea from a handling perspective. You may end up wanting to stow some heavy gear further forward to balance the trailer weight
front to rear.
If you won't use it nothing wrong with removing it but I don't think anyone intended to scare you off from exploring options for using it. More just a heads up.