Undo internal feed.

nuget.config

@@ -4,22 +4,11 @@
     <!--To inherit the global NuGet package sources remove the <clear/> line below -->
     <clear />
     <add key="nuget" value="https://api.nuget.org/v3/index.json" />
-    <add key="dotnet-tools" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json" />
-    <add key="azure-sdk-for-net-dev" value="https://pkgs.dev.azure.com/azure-sdk/public/_packaging/azure-sdk-for-net/nuget/v3/index.json" />
   </packageSources>
 
   <packageSourceMapping>
     <!-- key value for <packageSource> should match key values from <packageSources> element -->
     <clear />
-    <packageSource key="dotnet-tools">
-      <package pattern="Aspire.*" />
-      <package pattern="Microsoft.Extensions.ServiceDiscovery*" />
-    </packageSource>
-    <packageSource key="azure-sdk-for-net-dev">
-      <package pattern="Azure.Provisioning" />
-      <package pattern="Azure.ResourceManager" />
-      <package pattern="Azure.ResourceManager.*" />
-    </packageSource>
     <packageSource key="nuget">
       <package pattern="*" />
     </packageSource>