fix: removed assigned but never used variable (#13995)

src/Avalonia.Native/WindowImplBase.cs

@@ -10,10 +10,8 @@ using Avalonia.Input;
 using Avalonia.Input.Platform;
 using Avalonia.Input.Raw;
 using Avalonia.Native.Interop;
-using Avalonia.OpenGL;
 using Avalonia.Platform;
 using Avalonia.Platform.Storage;
-using Avalonia.Rendering;
 using Avalonia.Rendering.Composition;
 using Avalonia.Threading;
 
@@ -58,7 +56,6 @@ namespace Avalonia.Native
         private readonly IKeyboardDevice _keyboard;
         private readonly ICursorFactory _cursorFactory;
         private Size _savedLogicalSize;
-        private Size _lastRenderedLogicalSize;
         private double _savedScaling;
         private NativeControlHostImpl _nativeControlHost;
         private IStorageProvider _storageProvider;
@@ -172,7 +169,6 @@ namespace Avalonia.Native
                         if (_parent._native != null && _target != null)
                         {
                             cb(_parent._native);
-                            _parent._lastRenderedLogicalSize = _parent._savedLogicalSize;
                         }
                     }
                 }, (int)w, (int)h, new Vector(dpi, dpi));