Silence some pylint warnings.

apachedex/__init__.py

@@ -501,17 +501,17 @@ class AggregateSiteUrl(argparse.Action):
       dest.append((value, match, action))
 
 def _asMonthString(timestamp):
-  dt, tz = timestamp.split(' ')
+  dt, _ = timestamp.split(' ')
   _, month, year = dt.split(':', 1)[0].split('/')
   return '%s/%02i' % (year, MONTH_VALUE_DICT[month])
 
 def _asDayString(timestamp):
-  dt, tz = timestamp.split(' ')
+  dt, _ = timestamp.split(' ')
   day, month, year = dt.split(':', 1)[0].split('/')
   return '%s/%02i/%s' % (year, MONTH_VALUE_DICT[month], day)
 
 def _asHourString(timestamp):
-  dt, tz = timestamp.split(' ')
+  dt, _ = timestamp.split(' ')
   date, hour, _ = dt.split(':', 2)
   day, month, year = date.split('/')
   return '%s/%02i/%s %s' % (year, MONTH_VALUE_DICT[month], day, hour)