[PATCH 4 of 5 in crew] repoview: remove unreachable code

[Bryan O'Sullivan]

# HG changeset patch
# User Bryan O'Sullivan <bryano at fb.com>
# Date 1365812332 25200
#      Fri Apr 12 17:18:52 2013 -0700
# Node ID fafe9ca2a749822128ea25c721a610b51713d826
# Parent  6edb0e18b83c441dcdee7146f40f49c79a2c69e1
repoview: remove unreachable code

Found using Cython.

diff --git a/mercurial/repoview.py b/mercurial/repoview.py
--- a/mercurial/repoview.py
+++ b/mercurial/repoview.py
@@ -36,7 +36,6 @@ def computehidden(repo):
             blockers.append(repo[bm].rev())
         blocked = cl.ancestors(blockers, inclusive=True)
         return frozenset(r for r in hideable if r not in blocked)
-    return frozenset()
 
 def computeunserved(repo):
     """compute the set of revision that should be filtered when used a server