How do we cleanup the old snapshots deployed by Jenkins?

[Martin Desruisseaux]

Hello all

Pardon me if I missed the answer to this question in some FAQ, but I was
wondering: how can we delete the old snapshots in the
http://repository.apache.org/content/groups/snapshots/ repository after
a project updated the version number after a release? For example now
that our project development switched to 0.5-SNAPSHOT, I would like to
delete the 0.4-SNAPSHOT artefacts (or at least the 0.3-SNAPSHOT ones).

    Thanks,

        Martin