Remove and consolidate NuGet.config feeds

NuGet.config

@@ -6,29 +6,27 @@
   <!-- Only specify feed for Arcade SDK (see https://github.com/Microsoft/msbuild/issues/2982) -->
   <packageSources>
     <clear />
+
+    <!--
+    Consolidated feed for VSMac packages and other DevDiv feeds.
+    Reducing the number of feeds speeds up restore and improves reliability (as we want to move off unreliable feeds such as myget).
+    You can upload one-off packages here as well as add upstream feeds. Packages from upstream feeds will be cached on access.
+    This feed already includes nuget.org as upstream.
+
+    View and edit this feed, push new packages, view or add upstream feeds at:
+    https://devdiv.visualstudio.com/DevDiv/_packaging?_a=settings&feed=VSMac&view=upstreams&showFilters=true
+    -->
+    <add key="VSMac" value="https://devdiv.pkgs.visualstudio.com/DevDiv/_packaging/VSMac/nuget/v3/index.json" />
+
     <add key="dotnet-core" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" />
-    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
+    <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
+    <add key="dotnet5" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet5/nuget/v3/index.json" />
+    <add key="dotnet5-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet5-transport/nuget/v3/index.json" />
     <add key="fsharp-daily" value="https://www.myget.org/F/fsharp-daily/api/v3/index.json" />
-    <add key="roslyn-master-nightly" value="https://dotnet.myget.org/F/roslyn-master-nightly/api/v3/index.json" />
-    <add key="myget-dotnet-core" value="https://dotnet.myget.org/F/dotnet-core/api/v3/index.json" />
-    <add key="dotnet-buildtools" value="https://dotnet.myget.org/F/dotnet-buildtools/api/v3/index.json" />
-    <add key="roslyn-tools" value="https://dotnet.myget.org/F/roslyn-tools/api/v3/index.json" />
-    <add key="roslyn" value="https://dotnet.myget.org/F/roslyn/api/v3/index.json" />
-    <add key="symreader-converter" value="https://dotnet.myget.org/F/symreader-converter/api/v3/index.json" />
-    <add key="interactive-window" value="https://dotnet.myget.org/F/interactive-window/api/v3/index.json" />
     <add key="vs-devcore" value="https://myget.org/F/vs-devcore/api/v3/index.json" />
-    <add key="vs-editor" value="https://myget.org/F/vs-editor/api/v3/index.json" />
-    <add key="vssdk" value="https://pkgs.dev.azure.com/azure-public/vside/_packaging/vssdk/nuget/v3/index.json" />
-    <add key="vs-impl" value="https://pkgs.dev.azure.com/azure-public/vside/_packaging/vs-impl/nuget/v3/index.json" />
     <add key="roslyn_concord" value="https://myget.org/F/roslyn_concord/api/v3/index.json" />
-    <add key="dotnet-windowsdesktop" value="https://dotnetfeed.blob.core.windows.net/dotnet-windowsdesktop/index.json" />
-    <add key="aspnet-aspnetcore" value="https://dotnetfeed.blob.core.windows.net/aspnet-aspnetcore/index.json" />
-    <add key="aspnet-aspnetcore-tooling" value="https://dotnetfeed.blob.core.windows.net/aspnet-aspnetcore-tooling/index.json" />
-    <add key="aspnet-entityframeworkcore" value="https://dotnetfeed.blob.core.windows.net/aspnet-entityframeworkcore/index.json" />
-    <add key="aspnet-extensions" value="https://dotnetfeed.blob.core.windows.net/aspnet-extensions/index.json" />
     <add key="gRPC repository" value="https://grpc.jfrog.io/grpc/api/nuget/v3/grpc-nuget-dev" />
-    <add key="dotnet-tools" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json" />
-    <add key="dotnet5" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet5/nuget/v3/index.json" />
+
   </packageSources>
   <disabledPackageSources>
     <clear />