Remove gg_simpsons_desert

[hallwagner]

simpsons desert is fucking beast, its one of the only gg maps i dont rtv

[Kavinsky]

So we've got only 2 people out of a max of 18 possibile people here so thats still about 90% of people who may like this map and who may hate it.

wonder if theres a plug in that counts how many people have rtv'd a map out there.