remove un-needed feed

Author: tarekgh

NuGet.config

@@ -10,7 +10,6 @@
     <!--Begin: Package sources managed by Dependency Flow automation. Do not edit the sources below.-->
     <!--  Begin: Package sources from dotnet-emsdk -->
     <add key="darc-pub-dotnet-emsdk-0bcc3e6" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-0bcc3e67/nuget/v3/index.json" />    
-    <add key="darc-pub-dotnet-emsdk-b567cdb" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-b567cdb6/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-emsdk-b567cdb-3" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-b567cdb6-3/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-emsdk-b567cdb-2" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-b567cdb6-2/nuget/v3/index.json" />
     <add key="darc-pub-dotnet-emsdk-b567cdb-1" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-emsdk-b567cdb6-1/nuget/v3/index.json" />