changelog: adjust imports, comment

mercurial/changelog.py

@@ -1,15 +1,12 b''
-# hg.py - repository classes for mercurial
+# changelog.py - changelog class for mercurial
 #
 # Copyright 2005 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
-import sys, struct, os
-import util
+import os, time
 from revlog import *
-from demandload import *
-demandload(globals(), "time")
 
 class changelog(revlog):
     def __init__(self, opener):