Remove hyphen dictionary from WebKitUnitTests isolate file.

We need to remove this before we can delete the chromium
code.  AFAICT, webkit_unit_tests doesn't try to hyphenate.

BUG=None
R=ojan@chromium.org

Review URL: https://codereview.chromium.org/21124014

git-svn-id: svn://svn.chromium.org/blink/trunk@155269 bbb929c8-8fbe-4397-9dbb-9b2b20218538