Change Class behavior of hello world.

modules/default/helloworld/helloworld.js

@@ -11,16 +11,13 @@ Module.register("helloworld",{
 
 	// Default module config.
 	defaults: {
-		text: "Hello World!",
-		classes: "normal medium"
+		text: "Hello World!"
 	},
 
 	// Override dom generator.
 	getDom: function() {
 		var wrapper = document.createElement("div");
-		wrapper.className = this.config.classes;
 		wrapper.innerHTML = this.config.text;
-
 		return wrapper;
 	}
 });