[PATCH] exchange: remove duplicated addition to pushop.stepdone

[Pierre-Yves David]

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david at fb.com>
# Date 1408155501 25200
#      Fri Aug 15 19:18:21 2014 -0700
# Node ID 06aaeda2eb3038c67b6ea6c32cfb13ca9e532844
# Parent  8dda6f6ff564d8fe6ac7b8ce4c74eb9bfb5de14a
exchange: remove duplicated addition to pushop.stepdone

Not sure how it get there but it is useless.

diff --git a/mercurial/exchange.py b/mercurial/exchange.py
--- a/mercurial/exchange.py
+++ b/mercurial/exchange.py
@@ -351,11 +351,10 @@ def _pushb2ctx(pushop, bundler):
     """
     if 'changesets' in pushop.stepsdone:
         return
     pushop.stepsdone.add('changesets')
     # Send known heads to the server for race detection.
-    pushop.stepsdone.add('changesets')
     if not _pushcheckoutgoing(pushop):
         return
     pushop.repo.prepushoutgoinghooks(pushop.repo,
                                      pushop.remote,
                                      pushop.outgoing)