Delete legacy JSON metadata

Delete legacy `dataset_infos.json`.

dataset_infos.json

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-{"dialog_re": {"description": "DialogRE is the first human-annotated dialogue based relation extraction (RE) dataset aiming\nto support the prediction of relation(s) between two arguments that appear in a dialogue.\nThe dataset annotates all occurrences of 36 possible relation types that exist between pairs\nof arguments in the 1,788 dialogues originating from the complete transcripts of Friends.\n", "citation": "@inproceedings{yu2020dialogue,\n  title={Dialogue-Based Relation Extraction},\n  author={Yu, Dian and Sun, Kai and Cardie, Claire and Yu, Dong},\n  booktitle={Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics},\n  year={2020},\n  url={https://arxiv.org/abs/2004.08056v1}\n}\n", "homepage": "https://github.com/nlpdata/dialogre", "license": "https://github.com/nlpdata/dialogre/blob/master/license.txt", "features": {"dialog": {"feature": {"dtype": "string", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}, "relation_data": {"feature": {"x": {"dtype": "string", "id": null, "_type": "Value"}, "y": {"dtype": "string", "id": null, "_type": "Value"}, "x_type": {"dtype": "string", "id": null, "_type": "Value"}, "y_type": {"dtype": "string", "id": null, "_type": "Value"}, "r": {"feature": {"dtype": "string", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}, "rid": {"feature": {"dtype": "int32", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}, "t": {"feature": {"dtype": "string", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}}, "length": -1, "id": null, "_type": "Sequence"}}, "post_processed": null, "supervised_keys": null, "builder_name": "dialog_re", "config_name": "dialog_re", "version": {"version_str": "1.1.0", "description": null, "major": 1, "minor": 1, "patch": 0}, "splits": {"train": {"name": "train", "num_bytes": 1520940, "num_examples": 1073, "dataset_name": "dialog_re"}, "test": {"name": "test", "num_bytes": 472306, "num_examples": 357, "dataset_name": "dialog_re"}, "validation": {"name": "validation", "num_bytes": 490580, "num_examples": 358, "dataset_name": "dialog_re"}}, "download_checksums": {"https://raw.githubusercontent.com/nlpdata/dialogre/master/data_v2/en/data/train.json": {"num_bytes": 2338606, "checksum": "94b5799642107f9afecc5c46655d6d9612f41969893deff291b15a66298c08a0"}, "https://raw.githubusercontent.com/nlpdata/dialogre/master/data_v2/en/data/dev.json": {"num_bytes": 751932, "checksum": "3e0036a1853f33dd8fab1f008ff3c3b351f0b53e9084a6f6bce7b4c95d0f0472"}, "https://raw.githubusercontent.com/nlpdata/dialogre/master/data_v2/en/data/test.json": {"num_bytes": 725696, "checksum": "180e766323d2b5ae4763c77b2db280eeb49c909ab48c7393fbc309b7890061af"}}, "download_size": 3816234, "post_processing_size": null, "dataset_size": 2483826, "size_in_bytes": 6300060}}