remove unnecessary set side

examples/webgl_materials_nodes.html

@@ -1581,8 +1581,6 @@
 						mtl.environment = new THREE.ColorNode( 0xFFFFFF );
 						mtl.alpha = clouds;
 
-						defaultSide = THREE.FrontSide;
-
 						// GUI
 
 						addGui( 'color', mtl.environment.value.getHex(), function ( val ) {