[PATCH 4 of 4 lazy-manifest v2] context: don't sort manifest entries

[Augie Fackler]

# HG changeset patch
# User Augie Fackler <augie at google.com>
# Date 1416200425 18000
#      Mon Nov 17 00:00:25 2014 -0500
# Node ID 69278200bc1a32278b6820928e8386ebc619cefe
# Parent  13cbdac8a5a034c9a2de29da174160b1aefd1f99
context: don't sort manifest entries

The manifest iterator is now pre-sorted, so we can skip this check.

diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -101,8 +101,7 @@ class basectx(object):
         return self.filectx(key)
 
     def __iter__(self):
-        for f in sorted(self._manifest):
-            yield f
+        return iter(self._manifest)
 
     def _manifestmatches(self, match, s):
         """generate a new manifest filtered by the match argument