If you have any old or test order pages you wish to delete to clear up the list of your order pages, here's a step-by-step guide:
You can delete order pages from inside the settings panel from the dashboard. However, please note that once you delete an order page it can no longer be undone.
To get started, go to your Shopping cart → Order pages
Once you have selected which order page you're working on, click on Manage and it should redirect you here:
Continue by clicking on Settings
In the Order Page Set up, click on delete on the bottom of the page:
This message will appear.
After completing this, your order page is deleted!