Remove unknown key
repack avatar/female/head_long.png
repack enemies/archer.png
repack enemies/skeleton.png
repack enemies/caster.png
repack enemies/slime.png
repack enemies/rubysnake.png
repack enemies/knight.png
repack enemies/brawler.png
repack enemies/skeletonknight.png
repack enemies/snake.png
repack enemies/juggernaut.png
repack enemies/ghost.png
repack enemies/skeletonmage.png
repack enemies/bat.png
repack enemies/ghostdup.png
repack enemies/fireskeleton.png
repack enemies/zalkaz.png
repack powers/venom.png
repack powers/fireball.png