Updating Shared project to remove all .cs files. Was causing duplicate errors

Author: ShawnLaMountain

src/ThunderDesign.Net-PCL.Threading.Shared/ThunderDesign.Net-PCL.Threading.Shared.csproj

@@ -12,7 +12,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <Compile Include="**\*.cs" />
     <None Include="**\*.config" Pack="true" PackagePath="contentFiles\any\any\" />
   </ItemGroup>