Issue 5781 - Remove message responder code for emulated element hiding filters

background.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 358 matching lines @@
       matchesAny(url, requestType, docDomain, thirdParty)
       {
         let blocked = params.blockedURLs.split(",");
         if (blocked.indexOf(url) >= 0)
           return new modules.filterClasses.BlockingFilter();
         return null;
       }
     }
   };
 
-  modules.elemHideEmulation = {
-    ElemHideEmulation: {}
-  };
-
   modules.filterNotifier = {
     FilterNotifier: new EventEmitter()
   };
 
   modules.info = {
     platform: "gecko",
     platformVersion: "34.0",
     application: "firefox",
     applicationVersion: "34.0",
     addonName: "adblockplus",
@@ skipping 202 matching lines @@
       },
       filter: {
         text: "||example.com/some-annoying-popup$popup",
         whitelisted: false,
         userDefined: true,
         subscription: null
       }
     });
   });
 }());