remove(demo)!: remove LegacyDemo

Author: javier-godoy

src/test/java/com/flowingcode/vaadin/addons/demo/Demo.java

@@ -29,7 +29,6 @@
 public class Demo extends TabbedDemo {
 
   public Demo() {
-    addDemo(new LegacyDemo());
     addDemo(SampleDemo.class);
     addDemo(SampleDemoDefault.class);
     addDemo(SampleDemoHighlight.class);