App\Http\Controllers\Laralum\RolesController::deletePerm PHP Method

    public function deletePerm($perm_id, $role_id)
    {
        Laralum::permissionToAccess('laralum.roles.access');
        $rel = Permission_Role::wherePermission_idAndRole_id($perm_id, $role_id)->first();
        if ($rel) {
            $rel->delete();
        }
    }