Delete legacy JSON metadata

Delete legacy `dataset_infos.json`.

dataset_infos.json

@@ -1 +0,0 @@
-{"fi-sv": {"description": "fiskmo, a massive parallel corpus for Finnish and Swedish.", "citation": "J. Tiedemann, 2012, Parallel Data, Tools and Interfaces in OPUS. In Proceedings of the 8th International Conference on Language Resources and Evaluation (LREC 2012)", "homepage": "http://opus.nlpl.eu/fiskmo.php", "license": "", "features": {"translation": {"languages": ["fi", "sv"], "id": null, "_type": "Translation"}}, "post_processed": null, "supervised_keys": null, "builder_name": "opus_fiskmo", "config_name": "fi-sv", "version": {"version_str": "1.0.0", "description": null, "major": 1, "minor": 0, "patch": 0}, "splits": {"train": {"name": "train", "num_bytes": 326528834, "num_examples": 2100001, "dataset_name": "opus_fiskmo"}}, "download_checksums": {"https://object.pouta.csc.fi/OPUS-fiskmo/v2/moses/fi-sv.txt.zip": {"num_bytes": 144858927, "checksum": "f46c4936e482f3334bfc3e59ce74d3ebb334c7ff759548881ac2927241a085b9"}}, "download_size": 144858927, "post_processing_size": null, "dataset_size": 326528834, "size_in_bytes": 471387761}}