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/strip_package.py b/strip_package.py
index 3d500e1..dcb7f9a 100755
--- a/strip_package.py
+++ b/strip_package.py
@@ -7,9 +7,10 @@
 """Script that strips a given package and places the stripped version in
    /build/<board>/stripped-packages."""
 
-import builder
 import optparse
 
+import builder
+
 
 def main():
   parser = optparse.OptionParser(usage='usage: %prog [options] package')