[wsgi] Drop calls to repo.start_looping_tasks It's unlikely that these implementations were ever used so we do not bother with deprecation or a warning. We just drop the call to this method which should not be called from within a WSGI application. Related to #17057223.

cubicweb source: source-is-missing cubicweb/web/data/jquery.flot.js line length is * characters (>512)