Update quality tooling for formatting

[regisss]

What does this PR do?

Following the recent changes in Transformers regarding quality tools (see huggingface/transformers#21480 and huggingface/transformers#21493), the package flake8 is replaced by ruff. Files were formatted and corrected accordingly.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[regisss]

@JingyaHuang

• In optimum/onnxruntime/trainer.py, import fairscale is removed because unused. Is that okay?
• In optimum/onnxruntime/trainer_seq2seq.py , autocast seems unused. Can we remove the conditional statement where it is imported?

[fxmarty]

Awesome thank you!

[echarlaix]

Thanks for taking care of this @regisss !

[mht-sharma]

LGTM! Thanks for the PR

[michaelbenayoun]

LGTM!

Is all the reformating done by ruff? It seems very nice!

[JingyaHuang]

@JingyaHuang

• In optimum/onnxruntime/trainer.py, import fairscale is removed because unused. Is that okay?
• In optimum/onnxruntime/trainer_seq2seq.py , autocast seems unused. Can we remove the conditional statement where it is imported?

Hi @regisss, sure you can remove them, they are legacy code. Thanks for improving it!

[JingyaHuang]

That's great, thanks for updating the styling tools @regisss! Just left some questions to better understand the change. 💯

[regisss]

LGTM!

Is all the reformating done by ruff? It seems very nice!

@michaelbenayoun No, the formatting is still done by black. Ruff is a linter that can also do the same job as isort, so it will reorder imports, remove unused variables etc... It's more a replacement for the flake8 package, which we have never used in Optimum. And it's fast!