Unpin hfh
Needed to use those in dataset-viewer:

- dev version of hfh https://github.com/huggingface/dataset-viewer/pull/2781: don't span the hub with /paths-info requests
- dev version of datasets at https://github.com/huggingface/datasets/pull/6875: don't write too big logs in the viewer

close https://github.com/huggingface/datasets/issues/6863