Fix feeds (#36587)

Author: sebastienros

src/Components/benchmarkapps/BlazingPizza.Server/NuGet.config

@@ -2,11 +2,6 @@
 <configuration>
     <packageSources>
         <clear />
-        <add key="dotnet-core" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" />
-        <add key="extensions" value="https://dotnetfeed.blob.core.windows.net/aspnet-extensions/index.json" />
-        <add key="entityframeworkcore" value="https://dotnetfeed.blob.core.windows.net/aspnet-entityframeworkcore/index.json" />
-        <add key="aspnetcore-tooling" value="https://dotnetfeed.blob.core.windows.net/aspnet-aspnetcore-tooling/index.json" />
-        <add key="aspnetcore" value="https://dotnetfeed.blob.core.windows.net/aspnet-aspnetcore/index.json" />
-        <add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json" />
+        <add key="NuGet.org" value="https://api.nuget.org/v3/index.json" />
     </packageSources>
 </configuration>

src/Mvc/benchmarkapps/NuGet.config

@@ -2,11 +2,6 @@
 <configuration>
     <packageSources>
         <clear />
-        <add key="dotnet-core" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" />
-        <add key="extensions" value="https://dotnetfeed.blob.core.windows.net/aspnet-extensions/index.json" />
-        <add key="entityframeworkcore" value="https://dotnetfeed.blob.core.windows.net/aspnet-entityframeworkcore/index.json" />
-        <add key="aspnetcore-tooling" value="https://dotnetfeed.blob.core.windows.net/aspnet-aspnetcore-tooling/index.json" />
-        <add key="aspnetcore" value="https://dotnetfeed.blob.core.windows.net/aspnet-aspnetcore/index.json" />
-        <add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json" />
+        <add key="NuGet.org" value="https://api.nuget.org/v3/index.json" />
     </packageSources>
 </configuration>