chore(tox): remove psycopg2 from requirements

This package is already in the test image.

chore(tox): remove psycopg2 from requirements
This package is already in the test image.
37b9a687 · François Ferry · cdbdb52494c5 · 89e059cc
Commit 37b9a687 authored Sep 20, 2021 by François Ferry
--- a/test-requirements.txt
+++ b/test-requirements.txt
 cubicweb-relationwidget
 rdflib>= 4.1
-psycopg2
 #python-librdf