[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.
missing-dep-for-interpreter make => make | build-essential | dpkg-dev (usr/*/cubicweb/skeleton/debian/rules)
embedded-javascript-library usr/share/cubicweb/cubes/shared/data/jquery.js