CefSharp.csproj - Resolve build failed due to cherry pick

Commit d66798b added some files to the csproj file which aren't in this branch

Author: amaitland

CefSharp/CefSharp.csproj

@@ -102,9 +102,6 @@
     <Compile Include="CdmRegistration.cs" />
     <Compile Include="DefaultApp.cs" />
     <Compile Include="Enums\SchemeOptions.cs" />
-    <Compile Include="Internals\CommandLineArgDictionary.cs" />
-    <Compile Include="Internals\ReadOnlyNameValueCollection.cs" />
-    <Compile Include="Internals\TaskScheduler\LimitedConcurrencyLevelTaskScheduler.cs" />
     <Compile Include="IUrlRequest.cs" />
     <Compile Include="IUrlRequestClient.cs" />
     <Compile Include="ResourceRequestHandlerFactory.cs" />