Remove deprecated tasks (#2)

- Remove deprecated tasks (30b663b30081139471e6cc87faf9e6d591475866)

squad_bn.py

@@ -4,7 +4,6 @@ import os
 import json
 
 import datasets
-from datasets.tasks import QuestionAnsweringExtractive
 
 
 _CITATION = """\
@@ -61,11 +60,6 @@ class SquadBn(datasets.GeneratorBasedBuilder):
             homepage=_HOMEPAGE,
             license=_LICENSE,
             citation=_CITATION,
-            task_templates=[
-                QuestionAnsweringExtractive(
-                    question_column="question", context_column="context", answers_column="answers"
-                )
-            ],
         )
 
     def _split_generators(self, dl_manager):