[PR] Removes Obesity Mutation

[Clean Your Teeth]

I've used it as a ling to sting people into having most of their gear drop off them, and traitor geneticists can do similar stuff - having non-murder ways to mess with people adds value to the game. It's got more mechanical interactions than, say, Tourettes or Tinnitus.

If "Obesity" is beyond the pale, could re-naming it "Slippery Skin", or something, and removing the sprite change to keep that functionality in be an option?