gtkwindow: Remove an unnecessary set of grip setting
gtkwindow: Remove an unnecessary set of grip setting

We already update the grip position in _gtk_window_set_allocation, which
is done through the size_allocate above. Receiving a ConfigureNotify
also won't ever change a grip's visibility, so there's no point in
refreshing it.

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