fuse testsuite and coverage nox sessions

.gitlab-ci.yml

@@ -36,7 +36,6 @@ testsuite:
     - docker
   script:
     - nox --session testsuite
-    - nox --session report_coverage
   coverage: '/TOTAL.*\s+(\d+%)$/'
   artifacts:
     when: always

noxfile.py

@@ -61,12 +61,6 @@ def testsuite(session: nox.Session):
         "--cov-report=term",
         "--cov-config=pyproject.toml",
     )
-
-
-@nox.session(python="3.10", tags=["report"])
-def report_coverage(session: nox.Session):
-    """Produce HTML and XML coverage reports"""
-    session.install("coverage[toml]")
     session.run("coverage", "html")
     session.run("coverage", "xml")