Update wikipedia-nq-corpus.py

wikipedia-nq-corpus.py

@@ -87,13 +87,4 @@ class WikipediaNqCorpus(datasets.GeneratorBasedBuilder):
         with open(filepath, encoding="utf-8") as f:
             for line in f:
                 data = json.loads(line)
-                if self.config.name == 'corpus':
-                    yield data['docid'], data
-                else:
-                    if data.get('negative_passages') is None:
-                        data['negative_passages'] = []
-                    if data.get('positive_passages') is None:
-                        data['positive_passages'] = []
-                    if data.get('answers') is None:
-                        data['answers'] = []
-                    yield data['query_id'], data
+                yield data['docid'], data