Docs: Fixed MeshLambertMaterial viewer. See #7115 #7166.

docs/scenes/js/material.js

@@ -403,7 +403,6 @@ function guiMeshLambertMaterial ( gui, mesh, material, geometry ) {
 	folder.addColor( data, 'color' ).onChange( handleColorChange( material.color ) );
 	folder.addColor( data, 'emissive' ).onChange( handleColorChange( material.emissive ) );
 
-	folder.add( material, 'shading', constants.shading ).onChange( needsUpdate( material, geometry ) );
 	folder.add( material, 'wireframe' );
 	folder.add( material, 'wireframeLinewidth', 0, 10 );
 	folder.add( material, 'vertexColors', constants.colors ).onChange( needsUpdate( material, geometry ) );