mercurial/unionrepo.py

--- a/mercurial/unionrepo.py	Wed Sep 26 08:46:56 2018 -0700
+++ b/mercurial/unionrepo.py	Mon Sep 24 08:58:57 2018 -0700
@@ -219,10 +219,6 @@
         node = self.repo2.changelog.node(rev2)
         return self.changelog.rev(node)
 
-    def _constructmanifest(self):
-        return unionmanifest(self.svfs, self.repo2.svfs,
-                             self.unfiltered()._clrev)
-
     def url(self):
         return self._url