Remove duplicate content block.

src/Avalonia.Native/Avalonia.Native.csproj

@@ -23,12 +23,4 @@
     <PackageReference Include="SharpGen.Runtime.COM" Version="1.1.0" />
     <ProjectReference Include="..\..\packages\Avalonia\Avalonia.csproj" />
   </ItemGroup>
-
-  <ItemGroup Condition="'$(Configuration)' == 'Release' AND '$(IsPackable)' == 'true'">
-    <Content Include="../../Build/Products/Release/libAvalonia.Native.OSX.dylib">
-      <PackagePath>runtimes/osx/native/libAvaloniaNative.dylib</PackagePath>
-      <Pack>true</Pack>
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-  </ItemGroup>
 </Project>