remove-redundant-code
Author: simonJJJ
Pull request: yes

# What does this PR do?

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<!-- Remove if not applicable -->

remove redundant `PretrainedConfig._set_token_in_kwargs` in `PretrainedConfig.from_pretrained` since `PretrainedConfig.get_config_dict` also call `PretrainedConfig._set_token_in_kwargs`.


## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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## Who can review?

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Models:

- text models: @ArthurZucker
- vision models: @amyeroberts, @qubvel
- speech models: @ylacombe, @eustlb
- graph models: @clefourrier

Library:

- flax: @sanchit-gandhi
- generate: @zucchini-nlp (visual-language models) or @gante (all others)
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Comments:
Hi @ArthurZucker, can you take a quick look at this?