diff --git a/ielts_be/utils/image_to_b64.py b/ielts_be/utils/image_to_b64.py
deleted file mode 100644
index 2451707..0000000
--- a/ielts_be/utils/image_to_b64.py
+++ /dev/null
@@ -1,10 +0,0 @@
-def _b64_vision_images(path: str):
-    for filename in os.listdir(path):
-        if filename.startswith("cv-") and filename.endswith(".png"):
-            cv_dict.append({
-              "type": "image_url",
-              "image_url": {
-                "url": f"data:image/png;base64,{_encode_image(os.path.join(path, filename))}"
-              }
-            })
-    return cv_dict
\ No newline at end of file