Removing Python test server from browser tests.

BUG=none
TEST=exiting KioskAppManagerTest.*

Review URL: https://codereview.chromium.org/121503002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242590 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242590