To permanently delete a project and its designs in Infurnia, follow these steps:
Navigating to "View All projects" in your design home page. Option will be available on the left side.
Once you are in the project page, you will see list of each projects along with their respective names and details.
Navigate to the row containing project to be deleted, and select the 3-dot button against the same. In the menu that opens, select Delete.
In the pop-up that appears, select Delete to proceed with the deletion, else select Cancel.
Upon selecting Delete, the project will be deleted