--- a/mercurial/filelog.py	Thu Aug 09 16:02:14 2018 -0700
+++ b/mercurial/filelog.py	Thu Aug 09 16:11:24 2018 -0700
@@ -26,7 +26,6 @@
         self.filename = path
         self.index = self._revlog.index
         self.version = self._revlog.version
-        self.storedeltachains = self._revlog.storedeltachains
         self._generaldelta = self._revlog._generaldelta
 
     def __len__(self):