
This code was originally copied from `lightbox.js`, where the fallback is potentially useful because the duration is provided as an argument. The `timeLimitsManager` uses a constant as the duration, though, so the fallback is just confusing. Spotted in https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3655#note_2369352 Signed-off-by: Philip Withnall <pwithnall@gnome.org> Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3655>