To delete an element from your page, simply click the element to select it and then press the DELETE key on your keyboard or click the Home tab and the Delete button in the Editing area.
NOTE: The object must be checked out.
If you have a lot of elements on your page, you may want to use the Layers panel. Select the element in the list (NOTE: When the element is selected, handles appear on the element on the page). Then, press DELETE or click the Delete button in the Layers panel toolbar OR on the Home tab ribbon toolbar.