GtkStack: Remove some useless function calls
GtkStack: Remove some useless function calls

We will call gtk_widget_queue_resize anyway later when finishing the
(maybe non-running) transition, which will also cause the stack to be
repainted.

alexlarsson/gtk,jigpu/gtk,Adamovskiy/gtk,davidgumberg/gtk,chergert/gtk,jadahl/gtk,chergert/gtk,jigpu/gtk,jadahl/gtk,Adamovskiy/gtk,grubersjoe/adwaita,Adamovskiy/gtk,alexlarsson/gtk,grubersjoe/adwaita,chergert/gtk,Adamovskiy/gtk,davidgumberg/gtk,jigpu/gtk,jigpu/gtk,jigpu/gtk,alexlarsson/gtk,davidgumberg/gtk,davidgumberg/gtk,jadahl/gtk,jigpu/gtk,davidgumberg/gtk,chergert/gtk,chergert/gtk,davidgumberg/gtk,Adamovskiy/gtk,grubersjoe/adwaita,grubersjoe/adwaita,davidgumberg/gtk,grubersjoe/adwaita,jigpu/gtk,jadahl/gtk,grubersjoe/adwaita,chergert/gtk,jadahl/gtk,alexlarsson/gtk,alexlarsson/gtk,jadahl/gtk,grubersjoe/adwaita,Adamovskiy/gtk,chergert/gtk,davidgumberg/gtk,jadahl/gtk,Adamovskiy/gtk,chergert/gtk,alexlarsson/gtk,Adamovskiy/gtk,alexlarsson/gtk,alexlarsson/gtk,jigpu/gtk,grubersjoe/adwaita,jadahl/gtk