Clean up for //build demo

Author: jeffstall

Samples/Islands/WpfCalculator/CalculatorDemo/App_Demo3.cs

@@ -2,11 +2,9 @@
 // // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
 using System.Windows;
-
-#if true // Demo3_Step1_AddWasdk
-
 using Microsoft.UI.Dispatching;
 
+// Demo3_Step1_AddWasdk
 namespace CalculatorDemo
 {
     public partial class App : Application
@@ -29,5 +27,3 @@ protected override void OnExit(ExitEventArgs e)
         DispatcherQueueController? _dispatcherQueueController;
     }
 }
-
-#endif

Samples/Islands/WpfCalculator/CalculatorDemo/MainWindow_Demo3.cs

@@ -5,11 +5,10 @@
 using System.Windows;
 using System.Windows.Interop;
 
-#if true // Demo3_Step2_AddCompact
-
 using Microsoft.UI;
 using Microsoft.UI.Windowing;
 
+// Demo3_Step2_AddCompact
 namespace CalculatorDemo
 {
     public sealed partial class MainWindow : Window
@@ -56,5 +55,3 @@ void SetCompactView(bool useCompactView)
         }
    }
 }
-
-#endif

Samples/Islands/WpfCalculator/CalculatorDemo/MainWindow_Demo4.cs

@@ -1,11 +1,10 @@
 // // Copyright (c) Microsoft. All rights reserved.
 // // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
-using CommunityToolkit.WinAppSDK.LottieIsland;
 using System.Windows;
+using CommunityToolkit.WinAppSDK.LottieIsland;
 
-#if true // Demo3_Step2_AddCompact
-
+// Demo3_Step2_AddCompact
 namespace CalculatorDemo
 {
     public sealed partial class MainWindow : Window
@@ -22,5 +21,3 @@ private void CreateLottieIslandMenuItem_Click(object sender, RoutedEventArgs e)
         }
     }
 }
-
-#endif

Samples/Islands/WpfCalculator/CalculatorDemo/MainWindow_Demo4_Extra.cs

@@ -3,8 +3,7 @@
 
 using System.Windows;
 
-#if true // Demo3_Step2_AddCompact
-
+// Demo3_Step2_AddCompact
 namespace CalculatorDemo
 {
     public sealed partial class MainWindow : Window
@@ -28,5 +27,3 @@ private async void CreateSceneNodeIslandMenuItem_Click(object sender, RoutedEven
         }
     }
 }
-
-#endif