Removing a Story Format
To remove a story format, click the Delete button below its name. If you don't see a Delete button, you've selected a format that is built-in, or is currently your default or proofing story format.
If a story uses a story format you've removed, you'll need to change it to another format. Twine will also notice this problem the next time you start it and repair your story so that it uses the closest story format version available.