diff --git a/src/llamafactory/data/processors/supervised.py b/src/llamafactory/data/processors/supervised.py
index cd49fd0c..502b591c 100644
--- a/src/llamafactory/data/processors/supervised.py
+++ b/src/llamafactory/data/processors/supervised.py
@@ -4,7 +4,7 @@ from typing import TYPE_CHECKING, Any, Dict, List, Optional, Sequence, Tuple
 
 from ...extras.constants import IGNORE_INDEX
 from ...extras.logging import get_logger
-from .mm_utils import get_paligemma_token_type_ids, get_pixel_values, greedy_knapsack
+from .mm_utils import get_paligemma_token_type_ids, get_pixel_values
 
 
 if TYPE_CHECKING: