Removed the unused initial xml doc creation that happens automatically from...

Removed the unused initial xml doc creation that happens automatically from the XHR which returns an XML DOM object.

src/extras/loaders/ColladaLoader.js

@@ -30,12 +30,6 @@ THREE.ColladaLoader = function () {
 
 		if ( document.implementation && document.implementation.createDocument ) {
 
-			var namespaceURL = "http://www.collada.org/2005/11/COLLADASchema";
-			var rootTagName = "COLLADA";
-
-			var xmldoc = document.implementation.createDocument( namespaceURL, rootTagName, null );
-			var me = this;
-
 			// force reloading
 			// (should be configurable? sometimes caching is desirable)