SkinnedMesh: Removing check for now.

src/objects/SkinnedMesh.js

@@ -14,8 +14,6 @@ function SkinnedMesh( geometry, material ) {
 
 	Mesh.call( this, geometry, material );
 
-	if ( this.material.skinning === false ) console.warn( 'THREE.SkinnedMesh: Material must have skinning set to true.', this.material );
-
 	this.type = 'SkinnedMesh';
 
 	this.bindMode = 'attached';