Follow these steps:
- Go to your Studio page
- Click on the Make Decks link
- Look for the deck you want to delete, then click on the yellow Unprivate button. This will unpublish your deck.
- Once it is unpublished, you can delete the deck by clicking the red Delete button.
If your deck is published to the Boom store or featured, you need to unpublish the deck prior to deleting it.