Removing a load bearing wall
The presence of the header and the double top plate suggests to me  that it might be load bearing. I would not remove the header or the jack studs on which it rests. The small decorative center post* in the living space can be removed. Presumably any partition below what we can see in the picture can be removed as long as the jack studs (and king studs) were not compromised.

EDIT

*By the small center post I mean the decorative post in the living space. I don't mean the small "cripple" in the space between the header and the top plate.

EDIT

Disclaimer: I am not really knowledgeable about framing.