Remove chocolate infinismoke

[Mouse]

There's a trivially easy way to make a smoke mix that, as long as anyone is alive inside of it, will nigh-infinitely reproduce itself, covering an absurdly large area if used with newsmoke, lagging the game massively through the sheer number of reactions if not outright crashing it, and applying the TOUCH reaction so many times in such a short period that it's practically an instakill.

It involves chocolate, although IIRC there's a few other chems you can use.  I'd rather not disclose exactly how it works, it's abused enough already, but a brief look at the wiki should be enough to figure it out if you haven't already.