Delete legacy JSON metadata

Delete legacy `dataset_infos.json`.

dataset_infos.json

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-{"plain_text": {"description": "\nElkarHizketak is a low resource conversational Question Answering\n(QA) dataset in Basque created by Basque speaker volunteers. The\ndataset contains close to 400 dialogues and more than 1600 question\nand answers, and its small size presents a realistic low-resource\nscenario for conversational QA systems. The dataset is built on top of\nWikipedia sections about popular people and organizations. The\ndialogues involve two crowd workers: (1) a student ask questions after\nreading a small introduction about the person, but without seeing the\nsection text; and (2) a teacher answers the questions selecting a span\nof text of the section.  ", "citation": "@inproceedings{otegi-etal-2020-conversational,\n    title = \"{Conversational Question Answering in Low Resource Scenarios: A Dataset and Case Study for {B}asque}\",\n    author = \"Otegi, Arantxa  and\n      Agirre, Aitor  and\n      Campos, Jon Ander  and\n      Soroa, Aitor  and\n      Agirre, Eneko\",\n    booktitle = \"Proceedings of the 12th Language Resources and Evaluation Conference\",\n    year = \"2020\",\n    publisher = \"European Language Resources Association\",\n    url = \"https://aclanthology.org/2020.lrec-1.55\",\n    pages = \"436--442\",\n    ISBN = \"979-10-95546-34-4\",\n}\n", "homepage": "http://ixa.si.ehu.es/node/12934", "license": "Creative Commons Attribution-ShareAlike 4.0 International Public License (CC BY-SA 4.0)", "features": {"dialogue_id": {"dtype": "string", "id": null, "_type": "Value"}, "wikipedia_page_title": {"dtype": "string", "id": null, "_type": "Value"}, "background": {"dtype": "string", "id": null, "_type": "Value"}, "section_title": {"dtype": "string", "id": null, "_type": "Value"}, "context": {"dtype": "string", "id": null, "_type": "Value"}, "turn_ids": {"feature": {"dtype": "string", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}, "questions": {"feature": {"dtype": "string", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}, "yesnos": {"feature": {"num_classes": 3, "names": ["y", "n", "x"], "id": null, "_type": "ClassLabel"}, "length": -1, "id": null, "_type": "Sequence"}, "answers": {"feature": {"texts": {"feature": {"dtype": "string", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}, "answer_starts": {"feature": {"dtype": "int32", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}, "input_texts": {"feature": {"dtype": "string", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}}, "length": -1, "id": null, "_type": "Sequence"}, "orig_answers": {"texts": {"feature": {"dtype": "string", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}, "answer_starts": {"feature": {"dtype": "int32", "id": null, "_type": "Value"}, "length": -1, "id": null, "_type": "Sequence"}}}, "post_processed": null, "supervised_keys": null, "task_templates": null, "builder_name": "elkarhizketak", "config_name": "plain_text", "version": {"version_str": "1.0.0", "description": null, "major": 1, "minor": 0, "patch": 0}, "splits": {"train": {"name": "train", "num_bytes": 1024378, "num_examples": 301, "dataset_name": "elkarhizketak"}, "validation": {"name": "validation", "num_bytes": 125667, "num_examples": 38, "dataset_name": "elkarhizketak"}, "test": {"name": "test", "num_bytes": 127640, "num_examples": 38, "dataset_name": "elkarhizketak"}}, "download_checksums": {"http://ixa2.si.ehu.es/convai/elkarhizketak-v1.0/elkarhizketak-train-v1.0.json": {"num_bytes": 1543845, "checksum": "36674936820c9a5d8a5de144776dd57e2e4f5f63eec6ac45f93e47e5fd9daecd"}, "http://ixa2.si.ehu.es/convai/elkarhizketak-v1.0/elkarhizketak-dev-v1.0.json": {"num_bytes": 189736, "checksum": "fbf2e14b63de9a8406a9b44dccd0e2c4dcdf07724af737ccd05e06311a632f57"}, "http://ixa2.si.ehu.es/convai/elkarhizketak-v1.0/elkarhizketak-test-v1.0.json": {"num_bytes": 193893, "checksum": "311154feb69ede265ed695f97ab81811d78d837572114396b6e8779fdeb3e3f0"}}, "download_size": 1927474, "post_processing_size": null, "dataset_size": 1277685, "size_in_bytes": 3205159}}