Update app.py

remove background fill coloe

app.py

@@ -69,7 +69,6 @@ with open("style.css", "r") as f:
 custom_theme = gr.themes.Base(
     font=["Arial", "sans-serif"],
     primary_hue="#e2cb92",          # GWU official gold as primary color
-    background_fill_color="#002855", # GWU official blue as background color
     css=custom_css
 )