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

imagenet_sketch.py

@@ -17,7 +17,6 @@
 import os
 
 import datasets
-from datasets.tasks import ImageClassification
 
 from .classes import IMAGENET2012_CLASSES
 
@@ -61,7 +60,6 @@ class ImageNetSketch(datasets.GeneratorBasedBuilder):
             supervised_keys=("image", "label"),
             homepage=_HOMEPAGE,
             citation=_CITATION,
-            task_templates=[ImageClassification(image_column="image", label_column="label")],
         )
 
     def _split_generators(self, dl_manager):