You can only delete custom toolbars (ones created with the New button on the Customize dialog box); you can't delete toolbars that are core to the applications.
- Click the Customize menu and click Customize Mode.
- Click the Toolbars tab on the Customize dialog box.
- Click the custom toolbar you want to delete.
- Click Delete.
The toolbar is removed from the Toolbars list.
- Click Close.