diff --git a/NuGet.config b/NuGet.config
index 4600a23..de2f5d6 100644
--- a/NuGet.config
+++ b/NuGet.config
@@ -3,12 +3,7 @@
   <packageSources>
     <clear />
     <!-- ensure only the sources defined below are used -->
+    <add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json" protocolVersion="3" />
     <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" protocolVersion="3" />
-    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
-    <add key="dotnet internal feed" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" protocolVersion="3" />
-
-     <!-- This is needed (currently) for the Xamarin.Android.Deploy.Installer dependency, getting the installer -->
-     <!-- Android binary, to support delta APK install -->
-     <add key="xamarin.android util" value="https://pkgs.dev.azure.com/xamarin/public/_packaging/Xamarin.Android/nuget/v3/index.json" />
   </packageSources>
 </configuration>
diff --git a/azure-pipelines.yaml b/azure-pipelines.yaml
index ae5c086..9259859 100644
--- a/azure-pipelines.yaml
+++ b/azure-pipelines.yaml
@@ -45,12 +45,6 @@ jobs:
     inputs:
       versionSpec: 5.x
 
-  - script: |
-      dotnet tool install --global boots
-      boots https://download.mono-project.com/archive/6.12.0/macos-10-universal/MonoFramework-MDK-6.12.0.107.macos10.xamarin.universal.pkg
-    displayName: Install Mono 6.12
-    condition: and(succeeded(), eq(variables['agent.os'], 'Darwin'))
-
   - task: NuGetCommand@2
     displayName: 'NuGet Restore'
     inputs: