Have you ever looked for a way to delete an Attribute you created (by accident)? I did today, when I was making some documentation about a Management Pack I created.
As you can see there is no Delete option in the Authoring Pane of the OpsMgr Console.
So what’s the easiest and fasted way to delete an OpsMgr Attribute?
Answer: Using the Authoring Console.
Please check out Stefan Stranger's post on how to delete OpsMgr attributes. http://blogs.technet.com/stefan_stranger/archive/2008/10/02/deleting-opsmgr-attributes.aspx