Remove accidentally committed change.

src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj

@@ -32,7 +32,6 @@
         <Compile Include="AvaloniaXamlLoaderPortableXaml.cs" />
         <Compile Include="AvaloniaXamlLoader.cs" />
         <Compile Include="Converters\SetterValueTypeConverter.cs" />
-        <Compile Include="Data\XBinding.cs" />
         <Compile Include="MarkupExtensions\StyleIncludeExtension.cs" />
         <Compile Include="PortableXaml\AvaloniaXamlContext.cs" />
         <Compile Include="PortableXaml\XamlBinding.cs" />