[PATCH 1 of 6] ancestor: remove alias of initrevs from _lazyancestorsiter()

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1536673112 -32400
#      Tue Sep 11 22:38:32 2018 +0900
# Node ID 2989618d644ce4694a3288f8f20107f446703f66
# Parent  a1b6b1fcfd29503e8cb9c8cef617571334a69339
ancestor: remove alias of initrevs from _lazyancestorsiter()

It's just redundant and less comprehensible.

diff --git a/mercurial/ancestor.py b/mercurial/ancestor.py
--- a/mercurial/ancestor.py
+++ b/mercurial/ancestor.py
@@ -262,20 +262,18 @@ class incrementalmissingancestors(object
 # Extracted from lazyancestors.__iter__ to avoid a reference cycle
 def _lazyancestorsiter(parentrevs, initrevs, stoprev, inclusive):
     seen = {nullrev}
-    revs = initrevs
-
     schedule = heapq.heappush
     nextitem = heapq.heappop
     see = seen.add
 
     if inclusive:
-        visit = [-r for r in revs]
-        seen.update(revs)
+        visit = [-r for r in initrevs]
+        seen.update(initrevs)
         heapq.heapify(visit)
     else:
         visit = []
         heapq.heapify(visit)
-        for r in revs:
+        for r in initrevs:
             for parent in parentrevs(r):
                 if parent not in seen:
                     schedule(visit, -parent)