Merge branch 'fix-sales-form' into 'master'

fixed the showing of form confirmation

See merge request gitlab-com/www-gitlab-com!9109

source/sales/index.html.haml

@@ -27,25 +27,11 @@ extra_js:
     %form#mktoForm_1415
     :javascript
       MktoForms2.loadForm("//app-ab13.marketo.com", "194-VVC-221", 1415, function(form) {
-        form.onSuccess(function(values, followUpUrl) {
-
+        form.onSuccess(function() {
           form.getFormElem().hide();
-          document.getElementById('confirmform').style.visibility = 'visible';
-
-          dataLayer.push({event: 'mktoLead', mktoFormId: form.getId()});
+          $('.confirmform').attr('style', 'visibility: visible');
           return false;
         });
-        function getgacid() {
-          try {
-            var tracker = ga.getAll()[0];
-            return tracker.get('clientId');
-          } catch (e) {
-            return 'n/a';
-          }
-        }
-        form.vals({
-          'gacid': getgacid()
-        });
       });
     .confirmform{style: "visibility:hidden;"}
       %h3 Submission received!