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

@@ -11,10 +11,8 @@ licenses:
 multilinguality:
 - monolingual
 size_categories:
-  default:
-  - 10K<n<100K
-  pid2name:
-  - n<1K
+- 10K<n<100K
+- n<1K
 source_datasets:
 - original
 task_categories:
@@ -23,6 +21,9 @@ task_ids:
 - other-other-relation-extraction
 paperswithcode_id: fewrel
 pretty_name: Few-Shot Relation Classification Dataset
+configs:
+- default
+- pid2name
 ---
 
 # Dataset Card for few_rel