diff --git a/hgext3rd/commitextras.py b/hgext3rd/commitextras.py
deleted file mode 100644
--- a/hgext3rd/commitextras.py
+++ /dev/null
@@ -1,41 +0,0 @@
-# commitextras.py
-#
-# Copyright 2013 Facebook, Inc.
-#
-# 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.i18n import _
-from mercurial import (
-    commands,
-    extensions,
-    registrar,
-)
-
-cmdtable = {}
-command = registrar.command(cmdtable)
-testedwith = 'ships-with-fb-hgext'
-
-def extsetup(ui):
-    entry = extensions.wrapcommand(commands.table, 'commit', _commit)
-    options = entry[1]
-    options.append(('', 'extra', [],
-        _('set a changeset\'s extra values'), _("KEY=VALUE")))
-
-def _commit(orig, ui, repo, *pats, **opts):
-    origcommit = repo.commit
-    try:
-        def _wrappedcommit(*innerpats, **inneropts):
-            extras = opts.get('extra')
-            if extras:
-                for raw in extras:
-                    k, v = raw.split('=', 1)
-                    inneropts['extra'][k] = v
-            return origcommit(*innerpats, **inneropts)
-
-        # This __dict__ logic is needed because the normal
-        # extension.wrapfunction doesn't seem to work.
-        repo.__dict__['commit'] = _wrappedcommit
-        return orig(ui, repo, *pats, **opts)
-    finally:
-        del repo.__dict__['commit']
diff --git a/tests/test-commitextras.t b/tests/test-commitextras.t
deleted file mode 100644
--- a/tests/test-commitextras.t
+++ /dev/null
@@ -1,17 +0,0 @@
-  $ cat >> $HGRCPATH << EOF
-  > [extensions]
-  > commitextras=$TESTDIR/../hgext3rd/commitextras.py
-  > EOF
-
-Test stuff
-
-  $ hg init repo
-  $ cd repo
-  $ touch a
-  $ hg commit -Aqm a
-  $ echo a > a
-  $ hg commit -qm a2 --extra oldhash=foo --extra source=bar
-  $ hg log -r . -T '{extras % "{extra}\n"}'
-  branch=default
-  oldhash=foo
-  source=bar