Dude you could take them or leave them. I have upr lca's and i just went ahead and left mine on there. No reason to, i just didn't think about removing them. If thats all the rear suspension you have done(other than springs), i would just leave them if they aren't bothering anything
I have J&M Rear Lower Control Arms, Rear Shock Tower Brace, H&R Super Sport Springs, Steeda ,Rear Sway Bar, Welded Axel Tubes, Bilstein Shocks is there any need for side dampers.