diff -r 8b9b93bf70b1 -r 3682b49e0213 mercurial/filelog.py
--- a/mercurial/filelog.py	Thu Aug 09 19:30:36 2018 -0700
+++ b/mercurial/filelog.py	Thu Aug 09 19:27:54 2018 -0700
@@ -76,9 +76,6 @@
     def deltaparent(self, rev):
         return self._revlog.deltaparent(rev)
 
-    def candelta(self, baserev, rev):
-        return self._revlog.candelta(baserev, rev)
-
     def iscensored(self, rev):
         return self._revlog.iscensored(rev)