FOS\UserBundle\Controller\UserController::deleteAction PHP Method

    public function deleteAction($username)
    {
        $user = $this->findUserBy('username', $username);
        $this->container->get('fos_user.user_manager')->deleteUser($user);
        $this->setFlash('fos_user_user_delete', 'success');
        return new RedirectResponse($this->container->get('router')->generate('fos_user_user_list'));
    }