I have taken the cool side hide out of my Normals tank.. He never used it always burrowed next to it, He prefers the drift wood hide in the middle of the tank, but uses the hide on the hotside.
While I am not sold on the necessity of Identical hides Hot/Cool it seems to be the general consensus.
Some in tubs have one hide some have none.
I think it depends on your snake to be 100% honest