Delete legacy JSON metadata

Delete legacy `dataset_infos.json`.

dataset_infos.json

@@ -1 +0,0 @@
-{"samsum": {"description": "\nSAMSum Corpus contains over 16k chat dialogues with manually annotated\nsummaries.\nThere are two features:\n  - dialogue: text of dialogue.\n  - summary: human written summary of the dialogue.\n  - id: id of a example.\n", "citation": "\n@article{gliwa2019samsum,\n  title={SAMSum Corpus: A Human-annotated Dialogue Dataset for Abstractive Summarization},\n  author={Gliwa, Bogdan and Mochol, Iwona and Biesek, Maciej and Wawer, Aleksander},\n  journal={arXiv preprint arXiv:1911.12237},\n  year={2019}\n}\n", "homepage": "https://arxiv.org/abs/1911.12237", "license": "CC BY-NC-ND 4.0", "features": {"id": {"dtype": "string", "id": null, "_type": "Value"}, "dialogue": {"dtype": "string", "id": null, "_type": "Value"}, "summary": {"dtype": "string", "id": null, "_type": "Value"}}, "post_processed": null, "supervised_keys": null, "task_templates": null, "builder_name": "samsum", "config_name": "samsum", "version": "0.0.0", "splits": {"train": {"name": "train", "num_bytes": 9479141, "num_examples": 14732, "dataset_name": "samsum"}, "test": {"name": "test", "num_bytes": 534492, "num_examples": 819, "dataset_name": "samsum"}, "validation": {"name": "validation", "num_bytes": 516431, "num_examples": 818, "dataset_name": "samsum"}}, "download_checksums": {"https://huggingface.co/datasets/samsum/resolve/main/data/corpus.7z": {"num_bytes": 2944100, "checksum": "a97674c66726f66b98a08ca5e8868fb8af9d4843f2b05c4f839bc5cfe91e8899"}}, "download_size": 2944100, "post_processing_size": null, "dataset_size": 10530064, "size_in_bytes": 13474164}}