fix win32 interop build

src/Windows/Avalonia.Win32.Interop/Avalonia.Win32.Interop.csproj

@@ -5,6 +5,7 @@
     <UseWpf>true</UseWpf>
     <UseWindowsForms>true</UseWindowsForms>
     <ExtrasEnableImplicitWinFormsReferences>true</ExtrasEnableImplicitWinFormsReferences>
+    <EnableWindowsTargeting>true</EnableWindowsTargeting>
     <UseDirect3D9>true</UseDirect3D9>
     <PackageId>Avalonia.Win32.Interoperability</PackageId>
   </PropertyGroup>

src/Windows/Avalonia.Win32.Interop/Wpf/WpfTopLevelImpl.cs

@@ -81,12 +81,6 @@ namespace Avalonia.Win32.Interop.Wpf
             _ttl.ScalingChanged?.Invoke(_ttl.RenderScaling);
         }
 
-        
-        public IRenderer CreateRenderer(IRenderRoot root)
-        {
-            return new CompositingRenderer(root, Win32Platform.Compositor, () => _surfaces);
-        }
-
         public void Dispose()
         {
             _ttl.Closed?.Invoke();
@@ -128,7 +122,7 @@ namespace Avalonia.Win32.Interop.Wpf
         }
 
 
-
+        public Compositor Compositor => Win32Platform.Compositor;
         void ITopLevelImpl.SetInputRoot(IInputRoot inputRoot) => _inputRoot = inputRoot;
 
         Point ITopLevelImpl.PointToClient(PixelPoint point) => PointFromScreen(point.ToWpfPoint()).ToAvaloniaPoint();