Remove BinarySemaphoreWin.cpp.

Rubber-stamped by Beth Dakin.

BinarySemaphoreWin has been moved to WTF, but the original was never removed.

* Platform/CoreIPC/win/BinarySemaphoreWin.cpp: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149748 268f45cc-cd09-0410-ab3c-d52691b4dbfc