I found a new, working download URL, so I abort the deletion request. On Fri, 9 Feb 2018 14:31:01 +0000 (UTC), notify@aur.archlinux.org wrote about "[PRQ#10534] Deletion Request for idos-timetable-data-zsr-sk-2017-latest":

dreieck [1] filed a deletion request for idos-timetable-data-zsr- sk-2017-latest [2]:

Upstream source file no longer available.

[1] https://aur.archlinux.org/account/dreieck/ [2] https://aur.archlinux.org/pkgbase/idos-timetable-data-zsr-sk-2017-latest/