[PRQ#59150] Deletion Request for uboot-rockpro64

MarsSeed [1] filed a deletion request for uboot-rockpro64 [2]: aarch64 only, not compatible with Arch Linux. Belongs to the ArchLinuxARM.org repos. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/uboot-rockpro64/