Yes, you can delete a printing method from the edit page. There are various printing methods available in order to print the product image. This is how you can do it.
Login to Backend
Navigate to Product Designer -> Manage Printing Methods.
You will land on the Printing Methods page where there is a list of printing methods. Go to the Edit button in the Action column. You will be directed to the Edit Printing Method page.
On the right side of the page, a Delete button is displayed. By clicking on it a pop-up will appear which makes sure if you really want to delete or not. Click on OK to delete that particular printing method.
