Remove unused imports

What can I say I just dislike warnings so when I can remove them I do
Sheep that died on fire drop cooked mutton

This is now like for other animals except that for when killed with a
fire aspect sword. Not sure how to check simply without changing to
entity damage event and then possibly checking if entity would die
instead of using entitydeathevent
Merge pull request #1 from pupnewfster/master

Cooked mutton from burned sheep instead of raw