Remove dead code in settingspage class (microsoft#875)

* Remove dead code in settingspage class

* Removed another unused function

* Revert "Removed another unused function"

This reverts commit c7c170b.

Co-authored-by: Greg Woo <90726278+gregwoo-microsoft@users.noreply.github.com>

XamlControlsGallery/SettingsPage.xaml.cs

@@ -7,17 +7,12 @@
 // PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
 //
 //*********************************************************
-using AppUIBasics.Common;
 using AppUIBasics.Helper;
-using Microsoft.Graphics.Canvas.Effects;
 using System;
 using System.Linq;
-using Windows.ApplicationModel.Core;
 using Windows.Storage;
 using Windows.Storage.Pickers;
 using Windows.System;
-using Windows.UI;
-using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Input;
@@ -77,8 +72,6 @@ private void OnSettingsPageLoaded(object sender, RoutedEventArgs e)
         private void OnThemeRadioButtonChecked(object sender, RoutedEventArgs e)
         {
             var selectedTheme = ((RadioButton)sender)?.Tag?.ToString();
-            ApplicationViewTitleBar titleBar = ApplicationView.GetForCurrentView().TitleBar;
-
             if (selectedTheme != null)
             {
                 ThemeHelper.RootTheme = App.GetEnum<ElementTheme>(selectedTheme);
@@ -117,11 +110,6 @@ private void soundToggle_Toggled(object sender, RoutedEventArgs e)
             }
         }
 
-        private void navigationToggle_Toggled(object sender, RoutedEventArgs e)
-        {
-            NavigationOrientationHelper.IsLeftMode = navigationLocation.SelectedIndex == 0;
-        }
-
         private void screenshotModeToggle_Toggled(object sender, RoutedEventArgs e)
         {
             UIHelper.IsScreenshotMode = screenshotModeToggle.IsOn;