--- a/mercurial/repair.py	Sat Dec 15 20:08:13 2012 +0200
+++ b/mercurial/repair.py	Sat Jan 05 16:50:12 2013 +0200
@@ -6,7 +6,7 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
-from mercurial import changegroup, branchmap
+from mercurial import changegroup
 from mercurial.node import short
 from mercurial.i18n import _
 import os
@@ -57,10 +57,6 @@
 
 def strip(ui, repo, nodelist, backup="all", topic='backup'):
     repo = repo.unfiltered()
-    # It simplifies the logic around updating the branchheads cache if we only
-    # have to consider the effect of the stripped revisions and not revisions
-    # missing because the cache is out-of-date.
-    branchmap.updatecache(repo)
     repo.destroying()
 
     cl = repo.changelog