I'm doing an early 1.3.9 to current 1.3.9 upgrade, going through every file to winmerge in changes. I note that my html_output.php (functions) file includes: the following code:

/* ~~~~! Line added re: ZenCart Security Patch 090619 */
$form .= '<input type="hidden" name="securityToken" value="' . $_SESSION['securityToken'] . '" />';
The current version of this file does not include this line as far as I can see. Does this mean the patch is no longer required, or are we to keep it in even though it has not been implimented in the newest official releases of the files?