Update app.py

app.py

@@ -93,8 +93,7 @@ demo = gr.ChatInterface(
     theme=gr.themes.Soft(primary_hue="green", secondary_hue="indigo", neutral_hue="zinc",font=[gr.themes.GoogleFont("Exo"), "ui-sans-serif", "system-ui", "sans-serif"]).set(
         block_background_fill_dark="*neutral_950",
         input_background_fill_dark="*neutral_950",
-        message_border_radius="*radius_md",
-        border-color-accent-subdued="*neutral_900"
+        message_border_radius="*radius_md"
     ),
     css=css
 )