gmy [1] filed a deletion request for brightnessctl-sd-git [2]: The feature, which this package provides, has already been merged to community package "brightnessctl" - https://bugs.archlinux.org/task/65628.
[1] https://aur.archlinux.org/account/gmy/ [2] https://aur.archlinux.org/pkgbase/brightnessctl-sd-git/