[PRQ#58951] Merge Request for subsurface-libdc

ohli [1] filed a request to merge subsurface-libdc [2] into subsurface-libdc-git [3]: As subsurface & subsurface-libdc changed their release strategy to weekly builds [^1] and provides AppImages, this AUR package became useless. [^1]: https://subsurface-divelog.org/release-changes/ [1] https://aur.archlinux.org/account/ohli/ [2] https://aur.archlinux.org/pkgbase/subsurface-libdc/ [3] https://aur.archlinux.org/pkgbase/subsurface-libdc-git/