I would love to tear down this little wall. I know it's not structural but have no idea why the builders put it there. I was thinking perhaps plumbing ran down but it's just a bedroom directly above it (pics below).
Do you guys think builders just put it there to give a little separation from kitchen/living room? Any other reason?

upstairs directly above that wall
***CORRECTION*** the room above it ends right where that mini wall is standing.