--- a/mercurial/filelog.py	Mon Sep 24 09:59:19 2018 -0700
+++ b/mercurial/filelog.py	Mon Sep 24 10:08:58 2018 -0700
@@ -25,8 +25,6 @@
         # Full name of the user visible file, relative to the repository root.
         # Used by LFS.
         self._revlog.filename = path
-        # Used by changegroup generation.
-        self._generaldelta = self._revlog._generaldelta
 
     def __len__(self):
         return len(self._revlog)