Remove SkiaFontWin as it is no longer used

Source/platform/blink_platform.gyp

 #
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 306 matching lines @@
           ['include', 'clipboard/ClipboardUtilitiesWin\\.(cpp|h)$'],
 
           ['include', 'fonts/opentype/'],
           ['include', 'fonts/skia/FontCustomPlatformDataSkia\\.cpp$'],
           ['include', 'fonts/skia/FontCustomPlatformDataSkia\\.cpp$'],
           ['include', 'fonts/skia/GlyphPageTreeNodeSkia\\.cpp$'],
           ['include', 'fonts/skia/SimpleFontDataSkia\\.cpp$'],
           ['include', 'fonts/win/FontCacheSkiaWin\\.cpp$'],
           ['include', 'fonts/win/FontFallbackWin\\.(cpp|h)$'],
           ['include', 'fonts/win/FontPlatformDataWin\\.(cpp|h)$'],
-          ['include', 'fonts/win/SkiaFontWin\\.(cpp|h)$'],
           ['exclude', 'fonts/harfbuzz/FontPlatformDataHarfBuzz\\.cpp$'],
 
           # SystemInfo.cpp is useful and we don't want to copy it.
           ['include', 'win/SystemInfo\\.cpp$'],
         ],
       }, { # OS!="win"
         'sources/': [
           ['exclude', 'win/'],
           ['exclude', 'Win\\.cpp$'],
           ['exclude', '/(Windows)[^/]*\\.cpp$'],
@@ skipping 81 matching lines @@
           ['OS=="android"', {
             'cflags!': ['-mthumb'],
           }],
         ],
       },{  # target_arch!="arm"
         'type': 'none',
       }],
     ],
   }],
 }