hcartiaux [1] filed a deletion request for libjpeg-turbo-java [2]: The specificities of this package have been integrated upstream in the libjpeg-turbo PKGBUILD (by Gaetan Buisson). It is not needed anymore by turbovnc.
[1] https://aur.archlinux.org/account/hcartiaux/ [2] https://aur.archlinux.org/pkgbase/libjpeg-turbo-java/
