I'd take it back home and remove them yourself, it's not unreasonable for the dealer to charge to remove aftermarket parts. Price might be unreasonable however, YMMV.mine had the same issue, 2018 JL Rubicon, its in the shop for service since it still fell under the 3/36 warranty. Except my service advisor called me today to tell me they need to remove my after market rocksliders because jeep warranty wont cover it and its gonna cost me 145.00 dollars labor not to mention my rock light wire goes thru my cross member that has to be removed so that's another 125.00 labor charge. Thank you jeep cares for all you do LOL
At least the high dollar repair is being taken care of.