You will need to be in Step 3 Customize.
- Click on any letter that was typed, which will select that text box
- Click on the dashed outline of the text box until it is solid
- Press the Delete button on the keyboard
- The text box should now disappear from the template
If you have trouble selecting the text box, you can click on the Object List on the right and click on the trash can icon to delete any of the text boxes or images in your design.