All reports of remove-of-unknown-diversion for the archive. The extended description of this tag is:
The maintainer script removes a diversion that it didn't add. If you're cleaning up unnecessary diversions from older versions of the package, remove them in preinst or postinst instead of waiting for postrm to do it.
Severity: important, Certainty: certain
Check: scripts, Type: binary
This tag has not been emitted in any package tested by Lintian.