[PRQ#48418] Deletion Request for jdk16-adoptopenjdk

MarsSeed [1] filed a deletion request for jdk16-adoptopenjdk [2]: Cleanup of JDK 16 short-term support packages. JDK 16 and its Adoptium/Eclipse build is EOL since October 2021. Users should migrate to a newer JDK/JRE. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/jdk16-adoptopenjdk/