Revert of Add unittest for OpenTypeSanitizer (https://codereview.chromium.org/316343004/)

Reason for revert:
Crashes on WebKit Android (Nexus4) bot:

http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Android%20%28Nexus4%29/builds/14966

[----------] 1 test from OpenTypeSanitizerTest
[ RUN      ] OpenTypeSanitizerTest.TestWOFF
../../third_party/WebKit/Source/platform/fonts/opentype/OpenTypeSanitizerTest.cpp:54: Failure
Expected: (buffer->size()) >= (4u), actual: 0 vs 4
[ CRASHED      ]

Original issue's description:
> Add unittest for OpenTypeSanitizer
> 
> Since TestingPlatformSupport::unitTestSupport() doesn't implement required methods(webKitRootDir and readFromFile), I needed to put this test in platform_web_unittest_files.
> 
> BUG=371267
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=176593

TBR=jamesr@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/347173002

git-svn-id: svn://svn.chromium.org/blink/trunk@176638 bbb929c8-8fbe-4397-9dbb-9b2b20218538