Drop most of deprecated code
As in previous changesets, most code has been deprecated since a very
long time. This changeset concerns "core" cubicweb modules
(e.g. "server", "appobjects") for which it's not easy to handle change
atomically.
In cubicweb/server/querier.py, we adjust empty_rset() function as a
result of "rqlst" argument of ResultSet being dropped. (There was no use
of the keyword argument anyways.)
### Requirements for tests in various cubicweb/**/test directories. ###
## shared by several test folders
cubicweb-card == 0.5.8
docutils
Twisted < 16.0.0
webtest
## cubicweb/test
Pygments
mock
#fyzz XXX pip install fails
cubicweb-file == 1.18.0
cubicweb-localperms
cubicweb-tag == 1.8.3
## cubicweb/devtools/test
flake8
## cubicweb/hooks/test
psycopg2
## cubicweb/pyramid/test
pyramid >= 1.5.0
waitress >= 0.8.9
wsgicors >= 0.3
pyramid_multiauth
repoze.lru
## cubicweb/sobject/test
cubicweb-comment == 1.12.2