ZhangHua [1] filed a deletion request for linux-pf-pfkernel [2]: https://aur.archlinux.org/pkgbase/linux-pf-pfkernel#comment-935611 Official package has been adopted by pf kernel developers.
[1] https://aur.archlinux.org/account/ZhangHua/ [2] https://aur.archlinux.org/pkgbase/linux-pf-pfkernel/
