test: ignore HF_TOKEN in some unit tests

[anakin87]

Proposed Changes:

Just a quality of life improvement.

When you have a local Hugging Face token (in a HF_TOKEN env var), our tests fail.

So I am using monkeypatch.delenv to ignore this specific environment variable during the test execution.
https://docs.pytest.org/en/stable/how-to/monkeypatch.html

How did you test it?

My local tests now run properly; CI

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test: and added ! in case the PR includes breaking changes.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[coveralls]

Pull Request Test Coverage Report for Build 12311963817

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 90.479%

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Totals
Change from base Build 12299528849:	0.0%
Covered Lines:	8106
Relevant Lines:	8959

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💛 - Coveralls