[CSS Exclusions] Removed ExclusionShape dead code
https://bugs.webkit.org/show_bug.cgi?id=113904

Reviewed by Dirk Schulze.

No new tests, just removing dead code.

* rendering/ExclusionShape.cpp:
(WebCore::ExclusionShape::createExclusionShape):
* rendering/ExclusionShape.h:
(ExclusionShape):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147597 268f45cc-cd09-0410-ab3c-d52691b4dbfc