Remove Python < 2.6 compatibility imports from testserver.py.

Split out of https://chromiumcodereview.appspot.com/10073033.

BUG=none
TBR=rsleevi@chromium.org

Review URL: https://codereview.chromium.org/10909251

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@158196 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed