Remove curriculum code

Closes #157 (closed)

dan/manager/dataset.py

@@ -44,9 +44,6 @@ class OCRDataset(Dataset):
         # Load samples and preprocess images if load_in_memory is True
         self.samples = self.load_samples(paths_and_sets)
 
-        # Curriculum config
-        self.curriculum_config = None
-
     def __len__(self):
         """
         Return the dataset size