Remove redundant shell loading event.

Wino.Mail/AppShell.xaml

@@ -18,7 +18,6 @@
     xmlns:animations="using:CommunityToolkit.WinUI.Animations"
     xmlns:selectors="using:Wino.Selectors"
     muxc:BackdropMaterial.ApplyToRootOrPageBackground="{ThemeResource UseMica}"
-    Loaded="OnShellLoaded"
     mc:Ignorable="d">
 
     <Page.Resources>

Wino.Mail/AppShell.xaml.cs

@@ -207,11 +207,6 @@ namespace Wino.Views
             WeakReferenceMessenger.Default.Send(new ClearMailSelectionsRequested());
         }
 
-        private void OnShellLoaded(object sender, RoutedEventArgs e)
-        {
-
-        }
-
         private async void MenuItemContextRequested(UIElement sender, ContextRequestedEventArgs args)
         {
             // Delegate this request to ViewModel.