We currently do not provide a way for you to delete a project. If you need a project deleted and all data removed from CommCareHQ, please submit a request to us through the "Report an Issue" button on CommCareHQ.
If you do not need to delete the data but simply want to remove the project from your dashboard, any project admin can remove you as a web user from that project. If there is no other admin besides you, contact us through "Report an Issue" and a Dimagi staff member can remove you.