mvidaldp [1] filed a deletion request for grub-customizer-git [2]:

Duplicate of community package. Intended for Manjaro users since grub- customizer is not a community package there. Redone as manjaro-grub- customizer.

[1] https://aur.archlinux.org/account/mvidaldp/ [2] https://aur.archlinux.org/pkgbase/grub-customizer-git/