Remove unused defines and includes from FontPlatformDataWin

Now that we no longer have HFONT references in FontPlatformDataWin we
can remove a bunch of defines and includes.

R=schenney@chromium.org

Review URL: https://codereview.chromium.org/200693004

git-svn-id: svn://svn.chromium.org/blink/trunk@169779 bbb929c8-8fbe-4397-9dbb-9b2b20218538