nomisge [1] filed a deletion request for scenebuilder [2]:

This package is out-of-date and supplies the same software as javafx8-scenebuilder or the up-to-date javafx-scenebuilder. It can thus be deleted.

[1] https://aur.archlinux.org/account/nomisge/ [2] https://aur.archlinux.org/pkgbase/scenebuilder/