[PRQ#64805] Deletion Request for libblockdev-lean

MarsSeed [1] filed a deletion request for libblockdev-lean [2]: Unmaintained old version/duplicate from 2023 of Arch/extra/libblockdev. [a] Also badly packaged: gets built with systemd in makedepends, but omits the required runtime depends=systemd-libs. Not useful to keep this variant build, as Arch/extra repo carries separate packages for all the different modules, allowing users to pick and choose whichever they need for their setups. [a]: https://archlinux.org/packages/?q=libblockdev [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/libblockdev-lean/