[PATCH 1 of 6] revlog: delete dead assignment in addgroup()

[Martin von Zweigbergk]

# HG changeset patch
# User Martin von Zweigbergk <martinvonz at google.com>
# Date 1497558201 25200
#      Thu Jun 15 13:23:21 2017 -0700
# Node ID 6ca5567b543933b97926305a05a08764efc3aaf0
# Parent  29558247b00eff8c95c7604032b59cfbab34010d
revlog: delete dead assignment in addgroup()

diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -1856,7 +1856,6 @@
 
         # track the base of the current delta log
         content = []
-        node = None
 
         r = len(self)
         end = 0