Remove OS::WcsCpy from platform.h. This function is unused...

src/platform-win32.cc

Index: src/platform-win32.cc
===================================================================
--- src/platform-win32.cc	(revision 810)
+++ src/platform-win32.cc	(working copy)
@@ -685,13 +685,6 @@
 }
 
 
-void OS::WcsCpy(Vector<wchar_t> dest, const wchar_t* src) {
-  int result = wcscpy_s(dest.start(), dest.length(), src);
-  USE(result);
-  ASSERT(result == 0);
-}
-
-
 char *OS::StrDup(const char* str) {
   return _strdup(str);
 }