diff --git a/onnxruntime/python/tools/transformers/models/stable_diffusion/ort_optimizer.py b/onnxruntime/python/tools/transformers/models/stable_diffusion/ort_optimizer.py
index a298e515c1454..24570a6ef62da 100644
--- a/onnxruntime/python/tools/transformers/models/stable_diffusion/ort_optimizer.py
+++ b/onnxruntime/python/tools/transformers/models/stable_diffusion/ort_optimizer.py
@@ -12,7 +12,6 @@
 from pathlib import Path
 
 import onnx
-from optimize_pipeline import has_external_data
 from packaging import version
 
 from onnxruntime.transformers.fusion_options import FusionOptions
@@ -60,8 +59,6 @@ def optimize(self, input_fp32_onnx_path, optimized_onnx_path, float16=True, keep
             fusion_options.enable_packed_kv = False
             fusion_options.enable_packed_qkv = False
 
-        use_external_data_format = has_external_data(input_fp32_onnx_path)
-
         m = optimize_model(
             input_fp32_onnx_path,
             model_type=self.model_type,