Are these side panels on the walls removable

turnip3445

i'm not sure if these panels in the picture are a benefit or a negative. I'd like to be able to easily remove them if necessary and maybe later put them back on. Are the rivets holding them in easily pop-able or need to be drilled out?
Picture is attached.

thank you all

turnip3445

PS: I m talking about the black panels covering the walls of the van.