Deleting leftover solution folder.

Author: realvizu

source/NsDepCop.Core.Test/NsDepCop.Core.Test.csproj

@@ -80,9 +80,7 @@
       <SubType>Designer</SubType>
     </None>
   </ItemGroup>
-  <ItemGroup>
-    <Folder Include="Common\" />
-  </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.