stylecontext: Remove values cache
stylecontext: Remove values cache

The code is confusing the stylecontext=>node transition, so I'll remove
it.

WIth the recent introduction of the parent style cachen, I'm not sure
it's worth it at all. Some crude benchmarking suggests a slight speedup
when removing the cache.

So no guarantees about adding it back later.

alexlarsson/gtk,grubersjoe/adwaita,chergert/gtk,grubersjoe/adwaita,Adamovskiy/gtk,grubersjoe/adwaita,grubersjoe/adwaita,chergert/gtk,jadahl/gtk,jadahl/gtk,Adamovskiy/gtk,davidgumberg/gtk,jigpu/gtk,alexlarsson/gtk,alexlarsson/gtk,ahodesuka/gtk,alexlarsson/gtk,alexlarsson/gtk,davidgumberg/gtk,grubersjoe/adwaita,Lyude/gtk-,davidgumberg/gtk,jigpu/gtk,alexlarsson/gtk,jigpu/gtk,davidgumberg/gtk,Adamovskiy/gtk,Lyude/gtk-,Adamovskiy/gtk,chergert/gtk,Lyude/gtk-,ahodesuka/gtk,ahodesuka/gtk,chergert/gtk,grubersjoe/adwaita,chergert/gtk,jadahl/gtk,ahodesuka/gtk,jadahl/gtk,davidgumberg/gtk,davidgumberg/gtk,jadahl/gtk,chergert/gtk,jigpu/gtk,jigpu/gtk,jigpu/gtk,Lyude/gtk-,davidgumberg/gtk,ahodesuka/gtk,grubersjoe/adwaita,chergert/gtk,alexlarsson/gtk,davidgumberg/gtk,jigpu/gtk,Adamovskiy/gtk,jadahl/gtk,Lyude/gtk-,Lyude/gtk-,chergert/gtk,Adamovskiy/gtk,jadahl/gtk,Adamovskiy/gtk,ahodesuka/gtk,grubersjoe/adwaita,jadahl/gtk,Adamovskiy/gtk,ahodesuka/gtk,Lyude/gtk-,Lyude/gtk-,ahodesuka/gtk,jigpu/gtk,alexlarsson/gtk