Drop unused property.

apachedex/__init__.py

@@ -248,7 +248,6 @@ class GenericSiteStats(object):
     self.threshold = threshold
     self.suffix = suffix
     self.error_detail = error_detail
-    self.getDuration = getDuration
     self.status = defaultdict(partial(defaultdict, int))
     if error_detail:
       self.error_url_count = defaultdict(partial(defaultdict, list))
@@ -256,7 +255,6 @@ class GenericSiteStats(object):
     self.apdex = defaultdict(partial(APDEXStats, threshold, getDuration))
 
   def rescale(self, convert, getDuration):
-    self.getDuration = getDuration
     for status, date_dict in self.status.iteritems():
       new_date_dict = defaultdict(int)
       for date, status_count in date_dict.iteritems():