revlog: delete obsolete comment
The comment seems to refer to code that was deleted in
557988c691d1
(revlog.addgroup(): always use _addrevision() to add new revlog
entries, 2010-10-08).
--- a/mercurial/revlog.py Thu Jun 15 13:23:21 2017 -0700
+++ b/mercurial/revlog.py Thu Jun 15 13:25:41 2017 -0700
@@ -1854,7 +1854,6 @@
this revlog and the node that was added.
"""
- # track the base of the current delta log
content = []
r = len(self)