remove unused ipsec.js

src/www/widgets/javascript/ipsec.js

-function updateIpsec(){
-	selectIntLink = "ipsecDetailed";
-	ipsecsettings = "ipsecDetail=";
-	ipsecsettings += d.getElementById(selectIntLink).checked;
-
-    selectIntLink = "ipsec-config";
-	textlink = d.getElementById(selectIntLink);
-	textlink.value = ipsecsettings;
-}