stevenhoneyman [1] filed a deletion request for xc16-toolchain-bin [2]:
duplicate of https://aur.archlinux.org/packages/microchip-mplabxc16-bin/
[1] https://aur.archlinux.org/account/stevenhoneyman/ [2] https://aur.archlinux.org/pkgbase/xc16-toolchain-bin/