The WA_Globals.php file in 2.1.1 is identical to 2.1.0 (out of the box). You shouldn't need to update anything, unless you have renamed your connections file or any other file or path referenced by the globals file.
Leave as is, and report any problem should one arise.
The instructions you were looking at were (I think) under the PowerCMS 2.1.0 heading - for people upgrading to 2.1.0 from an even older version.