You added a format by mistake? One of your formats does not exist anymore? Don't worry! You can easily remove a format from any product you have created.
Step 1: Click on the pencil icon of the product of which you want to delete a format.
Step 2: Scroll down in the product pop-up and click on the 'x' next to the format you want to delete.
Step 3: A message asking you to confirm will appear. Click on "Confirm".
Important: Each product must contain at least one format. If your product has only one format and you want to remove it, you will have to replace it with another format.