692a8a4d93
These days it's possible to chain up into the default get_paint_volume() implementation again, which renders clutter_actor_get_default_paint_volume() unnecessary. So remove that function and move clutter_actor_update_default_paint_volume() back into real_get_paint_volume() where it belongs. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1492>