remove unused feature in SAO.
remove unused feature in SAO.

bhouston/three.js,Jozain/three.js,Jozain/three.js,Jozain/three.js,bhouston/three.js,bhouston/three.js,bhouston/three.js,bhouston/three.js,Jozain/three.js,Jozain/three.js,bhouston/three.js,Jozain/three.js