requirements-test: Remove workarounds to fix pytest execution

pybadges v3.0 has recently been released so we can now remove those
workarounds to fix pytest execution as they are no longer needed.

requirements-test.txt

@@ -17,13 +17,3 @@ types-docutils
 types-psycopg2
 types-pyyaml
 types-requests
-
-# TODO: remove dependencies below once pybadges depends on Jinja2 >=3
-
-# Fix "ImportError: cannot import name 'soft_unicode' from 'markupsafe'"
-# when running pytest
-markupsafe < 2.1.0
-# Fix "ImportError: cannot import name 'json' from 'itsdangerous'"
-# when running pytest after calling "./bin/install" from swh-environement
-# in empty venv
-flask >= 1.1.4