MarsSeed [1] filed a deletion request for jakarta-oro [2]: Unused library. Broken: source 404.
Upstream says it's EOL [a]:
As of 2010-09-01, the ORO project is retired.
[a]: http://jakarta.apache.org/oro
[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/jakarta-oro/
