eZ\Publish\Core\Repository\RoleService::deleteRoleDraft PHP Method

    public function deleteRoleDraft(APIRoleDraft $roleDraft)
    {
        $loadedRoleDraft = $this->loadRoleDraft($roleDraft->id);
        $this->repository->beginTransaction();
        try {
            $this->userHandler->deleteRole($loadedRoleDraft->id, Role::STATUS_DRAFT);
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }
    }