Can't delete a package from commandline

Repro steps:

upload a package to ProGet default feed
execute the following command:

NuGet.exe delete TestPackage 1.0.0 <api_key> -Source <nuget_feed_url> -Verbosity detailed

Expected result: if the user has required permissions (Feeds_DeletePackage) the package should be successfully deleted from ProGet

Actual result:

c:\TEMP\test_proget>NuGet.exe delete TestPackage 1.0.0 <api_key> -Source <nuget_feed_url> -Verbosity detailed

TestPackage 1.0.0 will be deleted from the '<nuget_feed_url>'. Would you like to continue? (y/N) y
Deleting TestPackage 1.0.0 from the '<nuget_feed_url>'.
DELETE <nuget_feed_url>/TestPackage/1.0.0
System.InvalidOperationException: Failed to process request. 'Not Found'.
The remote server returned an error: (404) Not Found.. ---> System.Net.WebException: The remote server returned an error: (404) Not Found.
at System.Net.HttpWebRequest.GetResponse()
at NuGet.RequestHelper.GetResponse(Func`1 createRequest, Action`1 prepareRequest, IProxyCache proxyCache, ICredentialCache credentialCache, ICredentialProvider credentialProvider)
at NuGet.HttpClient.GetResponse()
at NuGet.PackageServer.EnsureSuccessfulResponse(HttpClient client, Nullable`1 expectedStatusCode)
--- End of inner exception stack trace ---
at NuGet.PackageServer.EnsureSuccessfulResponse(HttpClient client, Nullable`1 expectedStatusCode)
at NuGet.PackageServer.DeletePackageFromServer(String apiKey, String packageId, String packageVersion)
at NuGet.PackageServer.DeletePackage(String apiKey, String packageId, String packageVersion)
at NuGet.Commands.DeleteCommand.ExecuteCommand()
at NuGet.Commands.Command.Execute()
at NuGet.Program.Main(String[] args)

Hi Manuel,

The delete option was never implemented mainly because we never thought anyone would use it :) We can add the functionality to the next maintenance release (v2.1.5).

If you have enterprise support let us know via email (support@inedo.com) and we can implement it for you sooner.

We actually have two use cases for delete:

maintenance scripts (we have beta packages published for each commit so we need to perform periodically cleanup)
automatic validation of new ProGet releases (so we can quickly "validate" a new release before move it into production)

I know they aren't common use cases but it will be useful.