Drop systemd-resolved package.

The ctte has declared that the way the systemd-resolved tool works is incompatible with their decision to prioritize avahi in Debian. Furthermore, the resolved tool is being used to inflict pain on the maintainer, and induce burnout. Regrettably, the only safe solution to ensure this package is compliant with this decision is to drop it, as all reasonable alternatives put forward have been rejected: https://salsa.debian.org/systemd-team/systemd/-/merge_requests/289
(Closes: #1098914)