devserver: module import cleanup

* Import statements re-grouped: standard lib, third party,
  project-local; separated by a single line, preceded by a single line
  and followed by two lines. Each group is sorted alphabetically.

* Removed unused imports.

BUG=None
TEST=Passes unit tests.

Change-Id: Iee4f78b1256457bd19b2c159a29763ba3404c272
Reviewed-on: https://gerrit.chromium.org/gerrit/33859
Reviewed-by: Chris Sosa <sosa@chromium.org>
Commit-Ready: Gilad Arnold <garnold@chromium.org>
Tested-by: Gilad Arnold <garnold@chromium.org>
diff --git a/autoupdate.py b/autoupdate.py
index 52027d0..591fe80 100644
--- a/autoupdate.py
+++ b/autoupdate.py
@@ -2,10 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-from build_util import BuildObject
 from xml.dom import minidom
-
-import cherrypy
 import datetime
 import json
 import os
@@ -14,6 +11,9 @@
 import time
 import urlparse
 
+import cherrypy
+
+from build_util import BuildObject
 import log_util