[box-layout] delete the actor remove animation
[box-layout] delete the actor remove animation

Clutter destroys the child meta data before the remove vfunc is run, so it
is not possible to delay the removal of the actor to use in the animation.

jonnylamb/mx,clutter-project/mx,pwithnall/mx,jonnylamb/mx,pwithnall/mx,clutter-project/mx,pwithnall/mx,jonnylamb/mx,clutter-project/mx,jonnylamb/mx,clutter-project/mx,pwithnall/mx