diff --git a/hgext/convert/common.py b/hgext/convert/common.py
--- a/hgext/convert/common.py
+++ b/hgext/convert/common.py
@@ -192,10 +192,6 @@ class converter_sink(object):
         self.path = path
         self.created = []
 
-    def getheads(self):
-        """Return a list of this repository's heads"""
-        raise NotImplementedError
-
     def revmapfile(self):
         """Path to a file that will contain lines
         source_rev_id sink_rev_id
diff --git a/hgext/convert/hg.py b/hgext/convert/hg.py
--- a/hgext/convert/hg.py
+++ b/hgext/convert/hg.py
@@ -78,10 +78,6 @@ class mercurial_sink(converter_sink):
     def authorfile(self):
         return self.repo.join("authormap")
 
-    def getheads(self):
-        h = self.repo.changelog.heads()
-        return [hex(x) for x in h]
-
     def setbranch(self, branch, pbranches):
         if not self.clonebranches:
             return