[server] remove cnxset tracking, it is now unneeded Indeed, all cnxsets will now be acquired using the following API:: with session.new_cnx() as cnx: cnx.execute(...) # do stuff cnx.commit() These well-scoped blocks are the only place a cnxset can be acquired. The old use-case for un-delimited cnxsets (pyro/zmqpickle protocols) have been removed. The "mode" of connection objects becomes "write" forever (it will be removed in a couple of changesets). Related to #2919309.

usr/lib/PY_VERSION/*-packages/cubicweb/devtools/
usr/lib/PY_VERSION/*-packages/cubicweb/skeleton/
usr/lib/PY_VERSION/*-packages/cubicweb/test
usr/lib/PY_VERSION/*-packages/cubicweb/entities/test
usr/lib/PY_VERSION/*-packages/cubicweb/ext/test
usr/lib/PY_VERSION/*-packages/cubicweb/server/test
usr/lib/PY_VERSION/*-packages/cubicweb/sobjects/test
usr/lib/PY_VERSION/*-packages/cubicweb/hooks/test
usr/lib/PY_VERSION/*-packages/cubicweb/web/test
usr/lib/PY_VERSION/*-packages/cubicweb/etwist/test