moved GA Client ID code to JS custom GTM variable

LinkedIn - Demo Form Autofill.html

@@ -4,15 +4,7 @@
       iframeHolderDiv = document.createElement('div'), // so we can style location of button
       autoFillLocation = document.querySelector("form[id^='mktoForm_']"), // will only find first Marketo form on a page
       firstRow = document.querySelector('form .mktoFormRow'),
-      hiddenLinkedInInputs = document.createDocumentFragment(), // since we're creating multiple nodes, just do the add once
-      clientID = (function () {
-        try {
-          var tracker = ga.getAll()[0];
-          return tracker.get('clientId'); // GA/GTM will do this same thing in customTask - see GTM customTask variable
-        } catch (e) {
-          return 'n/a';
-        }
-      })(),
+      hiddenLinkedInInputs = document.createDocumentFragment(), // since we're creating multiple nodes, just do the add once      
       hiddenInputCreator = function (tagName, onChangeHandler) {
         var newInput = document.createElement('input');
         newInput.style.position = 'absolute';
@@ -321,7 +313,7 @@
                 values.Country,
                 values.Title,
                 '{{Page Path}}',
-                'gclid:' + clientID,
+                'gclid:' + '{{JS - GA Client ID}}',
               ].join(' | '),
             };
             console.log(eventData);