Removing cli nuget feed from nuget.config.

NuGet.config

@@ -3,6 +3,5 @@
   <packageSources>
     <add key="AspNetVNext" value="https://www.myget.org/F/aspnetcidev/api/v3/index.json" />
     <add key="NuGet" value="https://api.nuget.org/v3/index.json" />
-    <add key="dotnet-cli" value="https://www.myget.org/F/dotnet-cli/api/v3/index.json" />
  </packageSources>
 </configuration>