how do i remove these drums?

yes, wire brush the center hub & lug nuts off. also pound around the diameter --though not as hard as the center. if you have air --blow out the debris you created.

I use 2 ball pein hammers of the large variety one next to the surface & the other to strike the hammer-- this does not mar the brake drum as much.

hammer around the center in a circle-- pattern work your way from the inside diameter to the outside(stay on he flange area)
Take a break & use a smaller hammer & tap lighly around the whole drum-- you might be surprised & it will just "pop" then slide it off.
REPEAT
Lawrence