/**
  * Removes a permission from the system.  If recreated, the
  * permission would have to be set to all groups again.
  *
  * @final
  * @param string The name of the permission to remove
  * @return void
  */
 public final function RemovePermission($permission_name)
 {
     cms_mapi_remove_permission($permission_name);
 }
<?php

$gCms = cmsms();
echo '<p>Adding new permission...';
cms_mapi_create_permission($gCms, 'Manage All Content', 'Manage All Content');
echo '[done]</p>';
echo '<p>Removing stale permission...';
cms_mapi_remove_permission('Modify Page Structure');
echo '[done]</p>';
echo '<p>Updating schema version... ';
$query = "UPDATE " . cms_db_prefix() . "version SET version = 32";
$db->Execute($query);
echo '[done]</p>';