Remove the explicit setting of the hostname in the response

This is no longer required, as an application runs fine without.

BUG= https://github.com/dart-lang/appengine/issues/37
R=kustermann@google.com

Review URL: https://codereview.chromium.org//1275203004 .
2 files changed
tree: e151cdb497d9da614dc2a4ba1c4135ae290db7a1
  1. pkgs/