nuke clone material

nuke!

examples/js/loaders/GLTFLoader.js

@@ -919,36 +919,6 @@ THREE.GLTFLoader = ( function () {
 
 			},
 
-			/**
-			 * Clones a GLTFSpecularGlossinessMaterial instance. The ShaderMaterial.copy() method can
-			 * copy only properties it knows about or inherits, and misses many properties that would
-			 * normally be defined by MeshStandardMaterial.
-			 *
-			 * This method allows GLTFSpecularGlossinessMaterials to be cloned in the process of
-			 * loading a glTF model, but cloning later (e.g. by the user) would require these changes
-			 * AND also updating `.onBeforeRender` on the parent mesh.
-			 *
-			 * @param  {THREE.ShaderMaterial} source
-			 * @return {THREE.ShaderMaterial}
-			 */
-			cloneMaterial: function ( source ) {
-
-				var target = source.clone();
-
-				target.isGLTFSpecularGlossinessMaterial = true;
-
-				var params = this.specularGlossinessParams;
-
-				for ( var i = 0, il = params.length; i < il; i ++ ) {
-
-					target[ params[ i ] ] = source[ params[ i ] ];
-
-				}
-
-				return target;
-
-			},
-
 		};
 
 	}