remove JS to detect missing eventbrite iframe

Author: tobyhodges

_includes/javascript.html

@@ -37,13 +37,6 @@
     show_instructions();
 });
 
-  // detect misssing iframe for Eventbrite
-  $(document).ready(function(){
-      if ($('iframe').height() == 0) {
-          $('iframe').before('<p>Looks like your adblocker blocked the registration window. Please navigate to <a href="https://www.eventbrite.com/tickets-external?eid={{page.eventbrite}}&ref=etckt">https://www.eventbrite.com/tickets-external?eid={{page.eventbrite}}&ref=etckt</a> to register.</p>');
-      }
-  });
-
   // hide alerts when site is rendered on carpentries.github.io
   $(document).ready(function() {
       if (location.href.startsWith("https://carpentries.github.io/workshop-template/")) {