The spacing and thickness of them leads me to believe they could very well be load-bearing, which means you cannot just remove them.
No way to be sure from the picture, but don't remove them without having it checked out first.
I don't know if this is the right section or if anyone can even help me from a picture but here goes.
Is there any reason I can't remove this hideous box thing? I just want to remove the spindles. Is that something I should? Or is this keeping my attic up?