Remove unused method `calculate_num_image_tokens` from qwen2_vl.py (#5783)

python/sglang/srt/models/qwen2_vl.py

@@ -442,18 +442,6 @@ class Qwen2VLForConditionalGeneration(nn.Module):
         "up_proj": ("gate_up_proj", 1),
     }
 
-    def calculate_num_image_tokens(self, image_grid_thw: Tuple[int, int, int]):
-        processor = cached_get_processor(self.config._name_or_path)
-        grid_t, grid_h, grid_w = image_grid_thw
-        num_image_tokens = (
-            grid_t
-            * grid_h
-            * grid_w
-            // processor.image_processor.merge_size
-            // processor.image_processor.merge_size
-        )
-        return num_image_tokens
-
     def __init__(
         self,
         config: Qwen2VLConfig,