To delete a project first open the project so you're looking at the project dashboard.
Then in the footer of the project dashboard you'll see a "Delete" button at the left hand side.
When you click this button you'll see a confirmation popup asking you if you're sure you want to delete the project. Please make sure that you want to delete the project before confirming as this action can't be undone.
If you confirm you want to delete the project then the project and all data will be deleted and will no longer be accessible by anyone.
If you cancel then you'll be taken back to the project dashboard and your project will not be deleted.