Deleting is irreversible, and we cannot restore permanently deleted items. Confirmation is always required before any deletion, so be sure you're not accidentally deleting the wrong item.
Delete a template collection
Select
Templates in the sidebar or select it in More .Select Shared Library at the top of the page, and click Collections .
Clickon the right-hand side of the collection's name and select Delete collection .

In the pop-up window, click Delete collection .