[PRQ#63224] Deletion Request for lammpsdoc-git

MarsSeed [1] filed a deletion request for lammpsdoc-git [2]: Build broken. Repo got archived in 2020. [a] Marked no longer needed by README: "This tool is no longer necessary. All of the LAMMPS documentation has been successfully converted to ReStructured Text. This repository will now be archived for historic purposes." [a]: https://github.com/rbberger/lammps-doc-utils [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/lammpsdoc-git/