Fix Visual Domain Decathlon dataset labels.

By mistake, label=0 was being replaced with -1.

PiperOrigin-RevId: 263512606

tensorflow_datasets/image/visual_domain_decathlon.py

@@ -60,7 +60,7 @@ class VisualDomainDecathlonConfig(tfds.core.BuilderConfig):
   def __init__(self, num_classes, **kwargs):
     self.num_classes = num_classes
     if 'version' not in kwargs:
-      kwargs['version'] = tfds.core.Version('1.0.0')
+      kwargs['version'] = tfds.core.Version('1.1.0')
     super(VisualDomainDecathlonConfig, self).__init__(**kwargs)
 
 
@@ -157,7 +157,6 @@ def _generate_examples(self, images_archive, annotations_path, split):
         path=images_archive, method=tfds.download.ExtractMethod.TAR_STREAM):
       if image_fname in filename_to_label:
         label = filename_to_label[image_fname]
-        label = label or -1  # Note: No labels for test images.
         example = {
             'name': image_fname,
             'image': image_fobj,