title: Delete NuGet packages from Visual Studio Online Package Feed instead of Unlist
body: <p>Is it possible to delete <code>NuGet</code> packages from a Visual Studio Online package feed?</p>
  
  <p>I've setup CI on Visual Studio Online using the Build Tasks for a dotnet core project.</p>
  
  <p>One of the steps is to <code>pack</code> all the projects in the solution as <code>NuGet</code> packages and <code>push</code> these to the package feed.</p>
  
  <p>The build is working fine, however in my first attempt in the <code>pack</code> and <code>push</code> build steps I used a <code>**/.csproj</code> wildcard instead of <code>src/**/.csproj</code>. So it packed and pushed all my test projects too that were under <code>tests/**</code>.</p>
  
  <p>I'd like to delete these packages from the feed. The only option I could find in the UI was to <code>unlist</code> the packages. But the packages still exist after this operation.</p>
  
  <p>I also tried to delete the packages through the CLI: <code>nuget delete</code>. But it just does the same as <code>unlist</code>.</p>
  
  <p>Has anyone been able to delete their packages?</p>