Deletes the specified project resource identified by a tenant resource tag. The mothod removes a project lien with a 'TenantManager' origin if that was added. It will then attempt to delete the project. If that operation fails, this method also fails. After the project has been deleted, the tenant resource state is set to DELETED. To permanently remove resource metadata, call the RemoveTenantProject method. New resources with the same tag can't be added if there are existing resources in a DELETED state. Operation.