[doc] Drop reference to "make_cubicweb_application" in pyramid doc
This function got renamed into config_from_cwconfig and this is arguably an
internal detail so should not appear in the API documentation.
.. _session_module:
:mod:`cubicweb.pyramid.session`
-------------------------------
.. automodule:: cubicweb.pyramid.session
.. autofunction:: includeme
.. autofunction:: CWSessionFactory