<!--- Provide a general summary of the issue in the Title above --> Some of the dev dependencies in `pyproject.toml` may not be necessary anymore. Let's remove anything we don't need. ## Context <!--- How has this issue affected you? What are you trying to accomplish? --> <!--- Providing context helps us come up with a solution that is most useful in the real world --> Context is [here](https://github.com/jazzband/django-user-sessions/pull/170#pullrequestreview-1660831538).
