Delete third_party/harfbuzz

gyp/public_headers.gypi

 # Include this gypi to include all public header files that exist in the
 # include directory.
 #
 # The list is computed by running 'find include -name *.h' in the root dir of
 # the project.
 #
 {
   'variables': {
     'header_filenames': [
       'pdf/SkPDFDevice.h',
@@ skipping 141 matching lines @@
       'utils/win/SkTScopedComPtr.h',
       'xml/SkDOM.h',
       'xml/SkJS.h',
       'xml/SkXMLParser.h',
       'xml/SkBML_XMLParser.h',
       'xml/SkBML_WXMLParser.h',
       'xml/SkXMLWriter.h',
       'device/xps/SkXPSDevice.h',
       'device/xps/SkConstexprMath.h',
       'ports/SkTypeface_win.h',
-      'ports/SkHarfBuzzFont.h',
       'ports/SkFontConfigInterface.h',
       'ports/SkTypeface_mac.h',
       'ports/SkTypeface_android.h',
       'ports/SkFontStyle.h',
       'ports/SkFontMgr.h',
       'text/SkTextLayout.h',
       'core/SkColor.h',
       'core/SkFontHost.h',
       'core/SkMetaData.h',
       'core/SkRRect.h',
@@ skipping 111 matching lines @@
       'views/unix/XkeysToSkKeys.h',
       'views/SkKey.h',
       'views/SkView.h',
       'views/SkOSMenu.h',
       'views/SkOSWindow_Unix.h',
       'views/SkWidget.h',
       'views/SkOSWindow_Win.h',
     ],
   },
 }