Here you will know how to delete a project on your account.
Go to your dashboard, hover on the project you want to delete and click on the three dots, then click Move to Trash. A notification on top will show an item has been moved to trash.
The project will be put on the Trash tab. Click on it to see the moved projects.
The files on the Trash tab will be deleted forever after 30 days. If you want to completely delete it immediately or restore the project, go to the Trash tab, hover on your project, and click on the three dots. Then click on either Restore Project or Delete Forever.
If you click on Delete Forever, the project will be completely deleted from your account and it cannot be retrieved.