minextu [1] filed a deletion request for spl-linux-git [2]: SPL got merged into ZFS and is therefore no longer needed

The latest version of the SPL is maintained as part of the ZFS on Linux Github repository (https://github.com/zfsonlinux/spl)

[1] https://aur.archlinux.org/account/minextu/ [2] https://aur.archlinux.org/pkgbase/spl-linux-git/