transition: Clear the animatable member when removing on complete
transition: Clear the animatable member when removing on complete

jigpu/clutter,collects/clutter,ebassi/clutter,GNOME/clutter,jigpu/clutter,heysion/clutter-clone,Distrotech/clutter,Distrotech/clutter,Distrotech/clutter,djdeath/clutter-multithreaded,heysion/clutter-clone,collects/clutter,jigpu/clutter,djdeath/clutter,djdeath/clutter-multithreaded,collects/clutter,ebassi/clutter,heysion/clutter-clone,kerrickstaley/clutter-vala,jigpu/clutter,jigpu/clutter,djdeath/clutter,djdeath/clutter-multithreaded,kerrickstaley/clutter-vala,ebassi/clutter,djdeath/clutter-multithreaded,djdeath/clutter-android,djdeath/clutter,djdeath/clutter-android,GNOME/clutter,djdeath/clutter-android,ebassi/clutter,kerrickstaley/clutter-vala,Distrotech/clutter,djdeath/clutter-android,Distrotech/clutter,GNOME/clutter,GNOME/clutter,djdeath/clutter,heysion/clutter-clone,collects/clutter,heysion/clutter-clone,jigpu/clutter,kerrickstaley/clutter-vala,ebassi/clutter,Distrotech/clutter,djdeath/clutter-android,djdeath/clutter,collects/clutter,GNOME/clutter,djdeath/clutter