remove unused function

lib/ansible/callbacks.py

@@ -139,10 +139,6 @@ class PlaybookCallbacks(object):
     def __init__(self):
         pass
 
-    # TOOD: -- remove this
-    def set_playbook(self, playbook):
-        self.playbook = playbook
-
     def on_start(self):
         print "\n"
 

lib/ansible/playbook.py

@@ -75,7 +75,6 @@ class PlayBook(object):
         self.override_hosts   = override_hosts
         self.stats            = stats
 
-        self.callbacks.set_playbook(self)
         self.basedir = os.path.dirname(playbook)
         self.playbook = self._parse_playbook(playbook)