WebGPURenderer: Clean up. (#22420)

examples/jsm/renderers/webgpu/nodes/WebGPUNodeBuilder.js

@@ -46,10 +46,6 @@ class WebGPUNodeBuilder extends NodeBuilder {
 
 			shader = ShaderLib.standard;
 
-		} else if ( material.isMeshPhongMaterial ) {
-
-			shader = ShaderLib.phong;
-
 		} else {
 
 			shader = ShaderLib.common;