Remove vendored dependency `trec-car-tools`
See https://github.com/huggingface/datasets-server/tree/main/services/worker/vendors/trec-car-tools

It's not required anymore since we don't allow datasets with script.
Remove vendored dependency `trec-car-tools`: See https://github.com/huggingface/datasets-server/tree/main/services/worker/vendors/trec-car-tools

It's not required anymore since we don't allow datasets with script.