Commented out the "all_unnamed_world" section.

Many people have complained about world folders not generating. 
I don't believe mirroring for all worlds to the main world should be enabled by default, especially if the main world isn't "world."
If lines 34-43 are meant to simply be an example, they should probably be commented out just like lines 44-50.
p.s.idkwatimdoingihopeididthisright