--- a/mercurial/manifest.py	Mon May 03 12:21:46 2021 +0200
+++ b/mercurial/manifest.py	Mon May 03 12:21:56 2021 +0200
@@ -1907,14 +1907,6 @@
         )
 
     @property
-    def indexfile(self):
-        return self._revlog.indexfile
-
-    @indexfile.setter
-    def indexfile(self, value):
-        self._revlog.indexfile = value
-
-    @property
     def opener(self):
         return self._revlog.opener