remove old osx app menu from control catalog.

samples/ControlCatalog/App.xaml

@@ -17,16 +17,4 @@
     </Style>
     <StyleInclude Source="/SideBar.xaml"/>
   </Application.Styles>
-
-  <NativeMenu.Menu>
-      <NativeMenu>
-        <NativeMenuItem Header="Open" Clicked="OnOpenClicked"/>
-        <NativeMenuItem Header="Recent">
-          <NativeMenuItem.Menu>
-            <NativeMenu/>
-          </NativeMenuItem.Menu>
-        </NativeMenuItem>
-        <NativeMenuItem Header="Quit Avalonia" Gesture="CMD+Q"/>
-      </NativeMenu>
-  </NativeMenu.Menu>
 </Application>

samples/ControlCatalog/App.xaml.cs

@@ -13,15 +13,6 @@ namespace ControlCatalog
         public override void Initialize()
         {
             AvaloniaXamlLoader.Load(this);
-
-            Name = "Avalonia";
-
-            _recentMenu = (NativeMenu.GetMenu(this).Items[1] as NativeMenuItem).Menu;
-        }
-
-        public void OnOpenClicked(object sender, EventArgs args)
-        {
-            _recentMenu.Items.Insert(0, new NativeMenuItem("Item " + (_recentMenu.Items.Count + 1)));
         }
 
         public override void OnFrameworkInitializationCompleted()