diff -r 87eeb6966220 -r 03bedf1d09fc mercurial/filelog.py
--- a/mercurial/filelog.py	Tue Sep 18 18:03:41 2018 -0700
+++ b/mercurial/filelog.py	Tue Sep 18 18:21:47 2018 -0700
@@ -201,10 +201,6 @@
         self._revlog.indexfile = value
 
     @property
-    def datafile(self):
-        return self._revlog.datafile
-
-    @property
     def opener(self):
         return self._revlog.opener