Stop publishing assets to .NET BAR for release-5.11.x branch (#6299)

Author: kartheekp-ms

NuGet.Config

@@ -2,7 +2,6 @@
 <configuration>
   <packageSources>
     <clear />
-    <add key="dotnet-core" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" />
     <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
     <add key="myget-legacy@Local" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/myget-legacy%40Local/nuget/v3/index.json" />
     <add key="nuget-build" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/nuget-build/nuget/v3/index.json" />

build/bootstrap.proj

@@ -13,8 +13,6 @@
         <PackageDownload Include="ILMerge" version="[3.0.21]" />
         <PackageDownload Include="Lucene.Net" version="[3.0.3]" />
         <PackageDownload Include="Microsoft.VisualStudioEng.MicroBuild.Core" version="[0.4.1]" />
-        <PackageDownload Include="Microsoft.DotNet.Build.Tasks.Feed" version="[6.0.0-beta.20528.5]" />  <!-- for publishing to the .NET Core build asset registry (BAR) -->
-        <PackageDownload Include="Microsoft.DotNet.Maestro.Tasks" version="[1.1.0-beta.21117.3]" />  <!-- for publishing to the .NET Core build asset registry (BAR) -->
         <PackageDownload Include="Microsoft.Web.Xdt" version="[3.0.0]" />
         <PackageDownload Include="Newtonsoft.Json" version="[9.0.1]" />
         <PackageDownload Include="NuGet.Build.Tasks.Pack" version="[5.8.0]" />

build/publish.proj

@@ -463,20 +463,5 @@ steps:
     targetPath: "$(Build.Repository.LocalPath)\\logs\\LocalizationValidation"
   condition: "and(succeeded(), eq(variables['BuildRTM'], 'false'))"
 
-  # Use dotnet msbuild instead of MSBuild CLI.
-  # Using MSBuild CLI results in an assembly binding failure for NuGet.Common.dll 4.4.0.3 because Microsoft.DotNet.Build.Tasks.Feed.dll references SleetLib.dll which references NuGet.Common 4.4.0.3.
-  # The Microsoft.DotNet.Build.Tasks.Feed package includes NuGet.Common 4.9.0.6 and a binding redirection in Microsoft.DotNet.Build.Tasks.Feed.dll.config but the binding redirection is not processed.
-  # This would probably solve it:  https://github.com/Microsoft/msbuild/issues/1309
-- task: CmdLine@2
-  displayName: "Publish to the .NET Core build asset registry (BAR)"
-  inputs:
-    script: dotnet msbuild $(Build.Repository.LocalPath)\build\publish.proj /t:PublishToBuildAssetRegistry /p:NuGetClientNupkgsDirectoryPath=$(Build.Repository.LocalPath)\artifacts\$(NupkgOutputDir) /p:BUILD_BUILDNUMBER=$(Build.BuildNumber) /p:BUILD_SOURCEBRANCH=$(Build.SourceBranchName) /p:BUILD_SOURCEVERSION=$(Build.SourceVersion) /p:BUILD_REPOSITORY_URI=$(Build.Repository.Uri)  /p:BUILD_REPOSITORY_NAME=$(Build.Repository.Name) /p:ArtifactsLogDir=$(Build.Repository.LocalPath)\artifacts\manifests\ /p:MaestroApiEndpoint=$(MaestroApiEndpoint) /p:MaestroAccessToken=$(MaestroAccessToken)
-    workingDirectory: cli
-    failOnStderr: true
-  env:
-    DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
-    DOTNET_MULTILEVEL_LOOKUP: true
-  condition: " and(succeeded(),eq(variables['PublishArtifactsToDotNetBuildAssetRegistry'], 'true'), eq(variables['BuildRTM'], 'false')) "
-
 - task: MicroBuildCleanup@1
   displayName: "Perform Cleanup Tasks"