bbe54aa2ec
The VBLANK environmental variable is done universally in clutter-main.c as in commits e8562089 (main: Add a sync-to-vblank global flag) and db211a21 (Remove per-backend CLUTTER_VBLANK envvar), so remove these things here as well. https://bugzilla.gnome.org/show_bug.cgi?id=663999