Update app.py

app.py

@@ -39,6 +39,4 @@ sandbox = gr.Interface.load(
     description="""Demo for <a href="https://huggingface.co/stabilityai/stable-diffusion-2-1">AlStable</a> Stable Diffusion model.""",
     article=article,
     api_key=API_KEY
-)
-
-sandbox.queue(concurrency_count=20).launch()
+).queue(concurrency_count=20).launch()