Update app.py

app.py

@@ -143,8 +143,7 @@ css = '''
 
 @app.get("/chat")
 async def chat_ui(username: str, email: str):
-    with gr.Blocks(css=css) as demo:
-        gr.ChatInterface(
+    gr.ChatInterface(
             fn=chat_interface,
             css=css,
             description="Clara",