diff --git a/app/models/document.rb b/app/models/document.rb
index e2e0a8d00..48a0151eb 100644
--- a/app/models/document.rb
+++ b/app/models/document.rb
@@ -81,7 +81,5 @@ class Document < ActiveRecord::Base
     update_document(self.user,2,self.project)
   end
 
-  def expire_cache
-    ActionController::Base.new.expire_fragment('activities')
-  end
+
 end