Add _info(self) for image-segmentation

rock-glacier-dataset.py

@@ -70,10 +70,14 @@ class RockGlacierDataset(datasets.GeneratorBasedBuilder):
             "labels": datasets.features.ClassLabel(names=_NAMES),
             })
          keys = ("image", "labels")
-         task = [ImageClassification(image_column="image", label_column="labels")]
          
       if self.config.name == "image-segmentation":
-         pass
+         features = datasets.Features({
+            "image": datasets.Image(),
+            "labels": datasets.Image(),
+            })
+         keys = ("image", "labels")
+         
          
       return datasets.DatasetInfo(
                description=_DESCRIPTION,
@@ -81,7 +85,6 @@ class RockGlacierDataset(datasets.GeneratorBasedBuilder):
                supervised_keys=keys,
                homepage=_HOMEPAGE,
                citation=_CITATION,
-               task_templates=task,
                )