Sometimes the simplest tasks are not that obvious in WordPress. After you add a custom menu, you may decide to remove something. It’s very easy, if you know where to go:
In your WordPress dashboard go to Appearance -> Menus
Then follow the steps in this example:
1. Open the menu item you want to remove by clicking on the down arrow to the right of the page name.
2. Click “Remove”
3. Don’t forget to click the “Save Menu” button!