Do koji's compose directories need cleaning?

I'm unsure if this is something desired or if it is better to open a formal ticket on [releng|infra]. Looking in the compose directories of Koji I've noticed that there seem to be a lot of garbage leftover from old stuff: - in https://kojipkgs.fedoraproject.org/compose/iot/ there are composes back to Fedora 31 - in https://kojipkgs.fedoraproject.org/compose/updates/ there are composes back to Fedora 31, EPEL6, Fedora Modular 30 - again in https://kojipkgs.fedoraproject.org/compose/updates/ there are garbage directories starting with "[[ release.id_prefix.title() ]]-" which seem quite recent - again in https://kojipkgs.fedoraproject.org/compose/updates/ there are some ".shelve" files related to f26, f27 and f28 Do we want to clean those things up? Mattia