[PRQ#48414] Deletion Request for jdk18-temurin

MarsSeed [1] filed a deletion request for jdk18-temurin [2]: Cleanup of JDK 18 short-term support packages. JDK 18 is EOL since Sep 2022; not even security patches get delivered either from upstream or by Adoptium/Eclipse. User should migrate to a newer JDK/JRE. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/jdk18-temurin/