The red Development Server banner is automatically injected by the development server and is not part of the application being developed. It serves as a visual indicator to ensure that developers and clients know they are working on or viewing a development environment.
If you must remove the banner, you can add javascript code to hide or lower the opacity
of the div with id="DEVBANNER". This is not recommended. No action is necessary to
remove the banner when the site or app is moved onto a production host, the banner
only exists on development hosts.
If you have any concerns or questions, please contact the development team.