remove unused statement.

Change-Id: I229cc42904dadcf40b7386a12e91423826a13e4b
diff --git a/tempest/cmd/verify_tempest_config.py b/tempest/cmd/verify_tempest_config.py
index 630532c..c02a9c1 100644
--- a/tempest/cmd/verify_tempest_config.py
+++ b/tempest/cmd/verify_tempest_config.py
@@ -371,7 +371,6 @@
     replace = opts.replace_ext
     global CONF_PARSER
 
-    outfile = sys.stdout
     if update:
         conf_file = _get_config_file()
         CONF_PARSER = moves.configparser.SafeConfigParser()