1. Sign in to your Wordpress dashboard, and click on 'Appearance,' then click on 'Menus.'
2. Click on the menu you have assigned to the navigation bar. Here you'll see the list of pages/links attached to the menu.
3. Click the arrow on the right side of the specific page tab.
4. Click on 'Remove,' then click 'Save Menu.' This removes the deleted page from the navigation bar menu.