Remove outdated coupons banner from coupon list screen

[JorgeMucientes]

Coupons feature has been enabled for more than a year now. The current banner from the screen feels outdated and doesn't make sense anymore. Also the banner is shown when the search icon is tapped.

https://github.com/user-attachments/assets/48e96398-fbdb-4aa3-83df-d2c255a11474

[dangermattic]

Thanks for reporting! 👍