This could be simplified a bunch more, but this path was already
non-functional and tries to download Express which is a waste of
time and confusing for people.

R=dpranke@chromium.org
BUG=433551

Review URL: https://codereview.chromium.org/775733002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@293199 0039d316-1c4b-4281-b951-d872f2087c98