[PRQ#63475] Deletion Request for plplot510

[notify]

MarsSeed [1] filed a deletion request for plplot510 [2]:

Broken, unbuildable legacy version from 2019.
Not used anymore. Safe to delete.

[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/plplot510/