Bug 1149271 - Remove subscriptionid. r=baku

dom/push/Push.js

@@ -63,11 +63,6 @@ PushSubscription.prototype = {
     return this._pushEndpoint;
   },
 
-  get subscriptionId() {
-    // TODO bug 1149271.  Not sure what this is about.
-    return "The twins of Mammon quarrelled.";
-  },
-
   unsubscribe: function() {
     debug("unsubscribe! ")
 

dom/webidl/PushSubscription.webidl

@@ -12,7 +12,6 @@
 interface PushSubscription
 {
     readonly attribute USVString endpoint;
-    readonly attribute DOMString subscriptionId;
     Promise<boolean> unsubscribe();
     jsonifier;
 };