Fixed GLTFLoader example.

examples/webgl_loader_gltf.html

@@ -202,8 +202,7 @@
 					scene.add(ground);
 				}
 
-				THREE.GLTF2Loader.Shaders.removeAll(); // remove all previous shaders
-				loader = new THREE.GLTF2Loader;
+				loader = new THREE.GLTF2Loader();
 
 				for (var i = 0; i < extensionSelect.children.length; i++) {
 					var child = extensionSelect.children[i];