update gr.Radio function

app.py

@@ -54,7 +54,6 @@ iface = gr.Interface(
         gr.Textbox(lines=5, placeholder="Enter text (maximum 5 lines)", label="Input"),
         gr.Radio(
             choices=['en->ss', 'ss->en'],
-            default='en->ss',
             label='Direction'),
     ],
     outputs="text"