--- a/mercurial/commands.py	Wed Aug 17 20:37:54 2016 -0700
+++ b/mercurial/commands.py	Wed Aug 17 20:38:29 2016 -0700
@@ -1867,34 +1867,6 @@
     with repo.wlock(False):
         return cmdutil.copy(ui, repo, pats, opts)
 
-@command('debugcheckstate', [], '')
-def debugcheckstate(ui, repo):
-    """validate the correctness of the current dirstate"""
-    parent1, parent2 = repo.dirstate.parents()
-    m1 = repo[parent1].manifest()
-    m2 = repo[parent2].manifest()
-    errors = 0
-    for f in repo.dirstate:
-        state = repo.dirstate[f]
-        if state in "nr" and f not in m1:
-            ui.warn(_("%s in state %s, but not in manifest1\n") % (f, state))
-            errors += 1
-        if state in "a" and f in m1:
-            ui.warn(_("%s in state %s, but also in manifest1\n") % (f, state))
-            errors += 1
-        if state in "m" and f not in m1 and f not in m2:
-            ui.warn(_("%s in state %s, but not in either manifest\n") %
-                    (f, state))
-            errors += 1
-    for f in m1:
-        state = repo.dirstate[f]
-        if state not in "nrm":
-            ui.warn(_("%s in manifest1, but listed as state %s") % (f, state))
-            errors += 1
-    if errors:
-        error = _(".hg/dirstate inconsistent with current parent's manifest")
-        raise error.Abort(error)
-
 @command('debugcommands', [], _('[COMMAND]'), norepo=True)
 def debugcommands(ui, cmd='', *args):
     """list all available commands and options"""