remove opengl apicompat checks.

src/Avalonia.OpenGL/Avalonia.OpenGL.csproj

@@ -9,7 +9,5 @@
       <ProjectReference Include="..\Avalonia.Base\Avalonia.Base.csproj" />
       <ProjectReference Include="..\Avalonia.Controls\Avalonia.Controls.csproj" />
       <ProjectReference Include="..\Avalonia.Visuals\Avalonia.Visuals.csproj" />
-    </ItemGroup>
+    </ItemGroup>    
-
-    <Import Project="..\..\build\ApiDiff.props" />
 </Project>