Some datasets on the hub have a broken refs/convert/parquet
See https://huggingface.co/datasets/EleutherAI/the_pile_deduplicated/tree/refs%2Fconvert%2Fparquet

<img width="1074" alt="Capture d’écran 2023-02-24 à 11 11 35" src="https://user-images.githubusercontent.com/1676121/221152375-15b2a4a6-0017-4086-8824-88906a161478.png">

It seems like the branch has been created from `main`, but then no parquet files have been sent. It should be removed.
Some datasets on the hub have a broken refs/convert/parquet: See https://huggingface.co/datasets/EleutherAI/the_pile_deduplicated/tree/refs%2Fconvert%2Fparquet

<img width="1074" alt="Capture d’écran 2023-02-24 à 11 11 35" src="https://user-images.githubusercontent.com/1676121/221152375-15b2a4a6-0017-4086-8824-88906a161478.png">

It seems like the branch has been created from `main`, but then no parquet files have been sent. It should be removed.