User blog comment:GossipQueen/Bonjour Everyone!/@comment-4071562-20120313202135/@comment-1874924-20120313224458

Anyone can mark a page as a candidate for deletion, but only an admin (me, for example) can perform the actual "hit". Another option is that you can just upload another pic over it, using the same file name, if you don't mind the older version being accessible via the file history.