Hi Luanne,
Thank you for using the Support Forum. You should be able to delete them from the CentreWare Internet Services. Open CWIS for the machine. Select the Scan tab. On the left under the Display heading select the Templates button. select the template you want to delete from the list. You should see a Delete and Copy button at the top left, click on Delete, a confirmation box will display click on OK and the template will be deleted. The steps are very similar on the WorkCentre 7120 but the delete button will be on the right hand side.
If this does not help please consider contacting your support centre for further assistance.