PIL and soundfile shouldn't be required to run `transformers-cli env`
PIL and soundfile shouldn't be required to run `transformers-cli env`. 
Considering that, can someone fix this issue please? Please let me know if need more information from me.

_Originally posted by @LysandreJik in https://github.com/huggingface/transformers/pull/13588#pullrequestreview-757529042_

Thank you!
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