micwoj92 [1] filed a deletion request for unity-editor-lts-facebook [2]: Out of date and orphaned, according to wiki it should be not used, on top of that unityhub is much easier to use and manage versions.
[1] https://aur.archlinux.org/account/micwoj92/ [2] https://aur.archlinux.org/pkgbase/unity-editor-lts-facebook/
