Issue 3685 - Remove dead migration code from subscription initilization

background.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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 132 matching lines @@
     pages.forEach(refreshIconAndContextMenu);
   });
 }
 
 /**
  * This function is called on an extension update. It will add the default
  * filter subscription if necessary.
  */
 function addSubscription(prevVersion)
 {
-  // Make sure to remove "Recommended filters", no longer necessary
-  var toRemove = "https://easylist-downloads.adblockplus.org/chrome_supplement.txt";
-  if (toRemove in FilterStorage.knownSubscriptions)
-    FilterStorage.removeSubscription(FilterStorage.knownSubscriptions[toRemove]);
-
   // Add "acceptable ads" subscription for new users
   var addAcceptable = !prevVersion;
   if (addAcceptable)
   {
     addAcceptable = !FilterStorage.subscriptions.some(function(subscription)
     {
       return subscription.url == Prefs.subscriptions_exceptionsurl;
     });
   }
 
@@ skipping 22 matching lines @@
     {
       subscription.title = "Allow non-intrusive advertising";
       FilterStorage.addSubscription(subscription);
       if (subscription instanceof DownloadableSubscription && !subscription.lastDownload)
         Synchronizer.execute(subscription);
     }
     else
       addAcceptable = false;
   }
 
-  // Add "anti-adblock messages" subscription for new users and users updating from old ABP versions
-  if (!prevVersion || Services.vc.compare(prevVersion, "1.8") < 0)
-  {
-    var subscription = Subscription.fromURL(Prefs.subscriptions_antiadblockurl);
-    if (subscription && !(subscription.url in FilterStorage.knownSubscriptions))
-    {
-      subscription.disabled = true;
-      FilterStorage.addSubscription(subscription);
-      if (subscription instanceof DownloadableSubscription && !subscription.lastDownload)
-        Synchronizer.execute(subscription);
-    }
-  }
-
   if (!addSubscription && !addAcceptable)
     return;
 
   Promise.resolve(addSubscription && fetch("subscriptions.xml")
     .then(function(response)
     {
       return response.text();
     })
     .then(function(text)
     {
@@ skipping 235 matching lines @@
   }
 });
 
 // update icon when page changes location
 ext.pages.onLoading.addListener(function(page)
 {
   page.sendMessage({type: "blockelement-finished"});
   refreshIconAndContextMenu(page);
   showNextNotificationForUrl(page.url);
 });