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

@@ -6,7 +6,7 @@ language_creators:
 languages:
 - en
 licenses:
-- cc-by-4-0
+- cc-by-4.0
 multilinguality:
 - monolingual
 size_categories:
@@ -14,17 +14,17 @@ size_categories:
 source_datasets:
 - original
 task_categories:
-  region_descriptions:
-  - image-to-text
-  objects:
-  - object-detection
-  question_answers:
-  - visual-question-answering
+- image-to-text
+- object-detection
+- visual-question-answering
 task_ids:
-  region_descriptions:
-  - image-captioning
+- image-captioning
 paperswithcode_id: visual-genome
 pretty_name: VisualGenome
+configs:
+- objects
+- question_answers
+- region_descriptions
 ---
 
 # Dataset Card for Visual Genome