Remove explicit model parameter

app.py

@@ -25,7 +25,7 @@ async def health():
 @app.post("/removebg")
 async def removebg(image: UploadFile = File(...)):
     img_bytes = await image.read()
-    result = await client.image_to_image(img_bytes, model=MODEL_ID)
+    result = await client.image_to_image(img_bytes)
     buf = io.BytesIO()
     result.save(buf, format="PNG")
     return Response(content=buf.getvalue(), media_type="image/png")