To delete a project, you must archive it first. This is a safety precaution to ensure you don't accidentally delete something.
From the main Projects page, scroll to the project you wish to archive, and click on the file box icon at the far right.
You'll then receive the message below.
Once you click OK, the project can then be located by checking "Show Archived" at the top of the page.
To delete the project, click the trash can icon to the right of the project. You can also unarchive from here.
⚠️ Once a project has been deleted, we are unable to recover it. This is why deleting a project requires "quadruple opt-in," meaning a project must be first explicitly archived (and warned first), then explicitly deleted (and warned again).