diff -r 31b7e8e7132e -r e23c03dc5cf9 mercurial/manifest.py
--- a/mercurial/manifest.py	Fri Sep 21 18:47:04 2018 -0700
+++ b/mercurial/manifest.py	Mon Sep 24 09:59:19 2018 -0700
@@ -1562,9 +1562,6 @@
     def deltaparent(self, rev):
         return self._revlog.deltaparent(rev)
 
-    def emitrevisiondeltas(self, requests):
-        return self._revlog.emitrevisiondeltas(requests)
-
     def emitrevisions(self, nodes, nodesorder=None,
                       revisiondata=False, assumehaveparentrevisions=False,
                       deltaprevious=False):