ArchangeGabriel [1] filed a deletion request for acpica [2]:
In [community]: https://www.archlinux.org/packages/community/x86_64/iasl/ (name is not the same, but package is).
[1] https://aur.archlinux.org/account/ArchangeGabriel/ [2] https://aur.archlinux.org/pkgbase/acpica/