Remove harmony-typeof

This was an early experiment in the Harmony era that turned out to
not be compatible with the web.

BUG=None
LOG=Y
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/408463003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22497 ce2b1a6d-e550-0410-aec6-3dcde31c8c00