title: How to delete a Fetch Request in XCode 4
body: <p>I'm a new user of the data model editor in XCode 4.  How do I delete a Fetch Request which I don't want?  It was difficult to figure out how to add one (click and hold the "Create Entity" button!).  But now that I've created one, I can't for the life of me figure out how to get rid of it.</p>
  
  <p>I'd also appreciated pointers to a good tutorial on building predicates.  eg something which answer how do you test if the year in a date attribute == something and similar questions.</p>