feat(Controls): Address Rule CA1823

src/Avalonia.Controls/Presenters/TextPresenter.cs

@@ -106,7 +106,6 @@ namespace Avalonia.Controls.Presenters
         private Rect _caretBounds;
         private Point _navigationPosition;
         private string? _preeditText;
-        private CharacterHit _compositionStartHit = new CharacterHit(-1);
 
         static TextPresenter()
         {

src/Avalonia.Controls/Primitives/SelectingItemsControl.cs

@@ -119,8 +119,6 @@ namespace Avalonia.Controls.Primitives
         /// </summary>
         public static readonly StyledProperty<bool> WrapSelectionProperty =
             AvaloniaProperty.Register<SelectingItemsControl, bool>(nameof(WrapSelection), defaultValue: false);
-
-        private static readonly IList Empty = Array.Empty<object>();
         private string _textSearchTerm = string.Empty;
         private DispatcherTimer? _textSearchTimer;
         private ISelectionModel? _selection;

src/Avalonia.Controls/Window.cs

@@ -169,10 +169,6 @@ namespace Avalonia.Controls
         /// </summary>
         public static readonly RoutedEvent<RoutedEventArgs> WindowOpenedEvent =
             RoutedEvent.Register<Window, RoutedEventArgs>("WindowOpened", RoutingStrategies.Direct);
-
-
-
-        private readonly NameScope _nameScope = new NameScope();
         private object? _dialogResult;
         private readonly Size _maxPlatformClientSize;
         private WindowStartupLocation _windowStartupLocation;
@@ -235,7 +231,7 @@ namespace Avalonia.Controls
             impl.GotInputWhenDisabled = OnGotInputWhenDisabled;
             impl.WindowStateChanged = HandleWindowStateChanged;
             _maxPlatformClientSize = PlatformImpl?.MaxAutoSizeHint ?? default(Size);
-            impl.ExtendClientAreaToDecorationsChanged = ExtendClientAreaToDecorationsChanged;            
+            impl.ExtendClientAreaToDecorationsChanged = ExtendClientAreaToDecorationsChanged;
             this.GetObservable(ClientSizeProperty).Skip(1).Subscribe(x => PlatformImpl?.Resize(x, PlatformResizeReason.Application));
 
             PlatformImpl?.ShowTaskbarIcon(ShowInTaskbar);