Remove deprecated tasks

This dataset uses `tasks`, which are deprecated and will raise an error after the next major release of `datasets`. See: https://github.com/huggingface/datasets/pull/6999

librispeech_asr.py

@@ -21,7 +21,6 @@ import os
 from pathlib import Path
 
 import datasets
-from datasets.tasks import AutomaticSpeechRecognition
 
 
 _CITATION = """\
@@ -102,7 +101,6 @@ class LibrispeechASR(datasets.GeneratorBasedBuilder):
             supervised_keys=("file", "text"),
             homepage=_URL,
             citation=_CITATION,
-            task_templates=[AutomaticSpeechRecognition(audio_column="audio", transcription_column="text")],
         )
 
     def _split_generators(self, dl_manager):