fix: CS0169 Never used field

src/Avalonia.Controls/NumericUpDown/NumericUpDown.cs

@@ -129,7 +129,6 @@ namespace Avalonia.Controls
         private bool _clipValueToMinMax;
         private bool _isSyncingTextAndValueProperties;
         private bool _isTextChangedFromUI;
-        private CultureInfo? _cultureInfo;
         private NumberStyles _parsingNumberStyle = NumberStyles.Any;
         private NumberFormatInfo? _numberFormat;
 

src/Avalonia.X11/NativeDialogs/Gtk.cs

@@ -258,9 +258,6 @@ namespace Avalonia.X11.NativeDialogs
 
         public static IntPtr GetForeignWindow(IntPtr xid) => gdk_x11_window_foreign_new_for_display(s_display, xid);
 
-        static object s_startGtkLock = new();
-        static Task<bool> s_startGtkTask;
-
         public static Task<bool> StartGtk()
         {
             return StartGtkCore();

src/Linux/Avalonia.LinuxFramebuffer/Input/EvDev/EvDevBackend.cs

@@ -13,7 +13,6 @@ namespace Avalonia.LinuxFramebuffer.Input.EvDev
         private readonly EvDevDeviceDescription[] _deviceDescriptions;
         private readonly List<EvDevDeviceHandler> _handlers = new List<EvDevDeviceHandler>();
         private int _epoll;
-        private bool _isQueueHandlerTriggered;
         private object _lock = new object();
         private Action<RawInputEventArgs> _onInput;
         private IInputRoot _inputRoot;