pytest_ignore_collect takes only collection_path starting with pytest 9. Most of the paths referenced in plotly/conftest.py don't exist anymore and wouldn't be collected anyway, so we can just remove the file (I think?).

I ran into this issue while running pytest instead of pytest tests with pytest 9.0.2 installed.

https://docs.pytest.org/en/latest/deprecations.html#py-path-local-arguments-for-hooks-replaced-with-pathlib-path

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