Clean up.

src/loaders/ImageLoader.js

@@ -29,7 +29,7 @@ Object.assign( ImageLoader.prototype, {
 			scope.manager.itemEnd( url );
 
 		};
-		image.onerror = onError; //Catch error in createElementNS
+		image.onerror = onError;
 
 		if ( url.indexOf( 'data:' ) === 0 ) {