i965: Drop Gen7+ nonsense from brw_ff_gs.c.

brw_ff_gs.c is about using the geometry shader to implement things
that the fixed function ought to do, but doesn't on old hardware.

Gen7+ does not need this.  We should drop the misleading comment
about Gen7 not using geometry shaders.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
1 file changed