zombie_reader lack "delete feed"

[n8willis]

Using z_r to browse a historical archive is extremely useful, however, it would also be useful to be able to remove unwanted feeds from the archive -- thus saving disk space and perhaps even z_r system resources. For example, to delete automatic, transient feeds like weather reports, saved ebay searches, etc., which are quite verbose but no longer relevant. Zombie_reader seems to lack this functionality at the moment.