Remove config names as yaml keys (#4367)

* validate YAML part

* fix bad YAML keys

* don't have config names as yaml keys

* style

* Remove hacking license tags when mirroring datasets on the Hub

* fix test

* fix style

* more fixes

* remove dots in QA column mapping keys

Commit from https://github.com/huggingface/datasets/commit/3f3013441e4af9bf4efa752b5e6e184a588b7a80

README.md

@@ -6,14 +6,12 @@ language_creators:
 languages:
 - en
 licenses:
-- cc-by-nc-4-0
+- cc-by-nc-4.0
 multilinguality:
 - monolingual
 size_categories:
-  cryptonite:
-  - 100K<n<1M
-  default:
-  - 1K<n<10K
+- 100K<n<1M
+- 1K<n<10K
 source_datasets:
 - original
 task_categories:
@@ -22,6 +20,9 @@ task_ids:
 - open-domain-qa
 paperswithcode_id: null
 pretty_name: Cryptonite
+configs:
+- cryptonite
+- default
 ---
 
 # Dataset Card for Cryptonite