[Fix] Fix wrong default CLASSES settings in `init_model`.

mmcls/apis/inference.py

@@ -40,11 +40,11 @@ def init_model(config, checkpoint=None, device='cuda:0', options=None):
         if 'CLASSES' in checkpoint.get('meta', {}):
             model.CLASSES = checkpoint['meta']['CLASSES']
         else:
-            from mmcls.datasets import ImageNet
+            from mmcls.datasets.categories import IMAGENET_CATEGORIES
             warnings.simplefilter('once')
             warnings.warn('Class names are not saved in the checkpoint\'s '
                           'meta data, use imagenet by default.')
-            model.CLASSES = ImageNet.CLASSES
+            model.CLASSES = IMAGENET_CATEGORIES
     model.cfg = config  # save the config in the model for convenience
     model.to(device)
     model.eval()