How to remove update notification while using Edwiser RemUI theme ?

Usually, the update notification is displayed as a banner throughout on the Moodle site

Use this code in the Custom CSS section inside Edwiser RemUI general settings-

.update-nag {
display:none;
}

Add this custom CSS in the theme settings by following this path Site Administration > Appearance > Edwiser RemUI settings > General Settings > Custom CSS section