yes. keep it for venus and athena. but even after you complete the quest you still have both and haven't dissapeared like other props do when you no longer need them. so i think perhaps you still need them for somthing later that this version did not cover or we have not discovered yet.

just make a Locker ( http://wlodb.com/items/4333 ) to hold all your quest props so its not taking up space for other items.