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/gmerge_test.py b/gmerge_test.py
index 833b7df..9e28ed7 100755
--- a/gmerge_test.py
+++ b/gmerge_test.py
@@ -6,10 +6,12 @@
 
 """Unit tests for gmerge."""
 
-import gmerge
 import os
 import unittest
 
+import gmerge
+
+
 class Flags(object):
   def __init__(self, dictionary):
     self.__dict__.update(dictionary)