diff -r 65b39c556c6d -r c71f80bfb414 mercurial/changegroup.py
--- a/mercurial/changegroup.py	Thu Sep 20 18:36:33 2018 +0300
+++ b/mercurial/changegroup.py	Wed Sep 19 23:36:16 2018 -0400
@@ -1120,9 +1120,6 @@
             commonctxs = [self._repo[c] for c in commonrevs]
             clrev = self._repo.changelog.rev
 
-            # Defining this function has a side-effect of overriding the
-            # function of the same name that was passed in as an argument.
-            # TODO have caller pass in appropriate function.
             def linknodes(flog, fname):
                 for c in commonctxs:
                     try: