Removed unused is_unloaded property on Response objects

Author: Daniel Herzog

src/network/network_service.js

@@ -743,8 +743,6 @@ cls.NetworkLoggerEntryPrototype = function()
   this._update_event_urlunload = function(event)
   {
     this.is_unloaded = true;
-    if (this._current_response)
-      this._current_response.update_event_urlunload(event);
   };
 
   this._update_event_urlfinished = function(event)
@@ -1119,11 +1117,6 @@ cls.NetworkLoggerResponsePrototype = function()
     this.responsebody = responsebody;
   };
 
-  this.update_event_urlunload = function(event)
-  {
-    this.is_unloaded = true; // todo: check if we use that on the response?
-  };
-
   // The following are to reflect changes that happened on Entry.
   this.update_event_urlfinished = function(event)
   {