Speeds up advanced optimizations.
Speeds up advanced optimizations.

There's no need to rerun duplicate removal and merging adjacent
optimizers since we have smart reordering in place.

GerHobbelt/clean-css,MartyIX/clean-css,shelsonjava/clean-css,vlajos/clean-css,scottgonzalez/clean-css,stuht/clean-css,jakubpawlowicz/clean-css,yomed/clean-css,island205/clean-css