Users with the required Permissions can delete a template that is no longer needed.
Steps to Delete a Correspondence Template
Click Administration > System Configuration > Correspondence Templates. The Correspondence Templates screen displays as shown below.

Select the template type (Request, Memo, or Email). The list of templates corresponding with the selected type appears.
Select the template you want to delete. The first template will be selected by default.
Click Delete. A verification message will display asking "Do you want to delete the template? Click OK to delete the template or Cancel to abort.