As mook14 said, the main reason is lack of $$ and fisherman fishing the stocked streams in the fall. There's a few stocked streams I fish in the fall that got taken off the list as well. Stinks, I'll miss fishing them this fall..
With that said, Forest County(and lots of others) has lots of streams that don't need stocked
Other counties though, without the stocking program there wouldn't be any trout..