Removed dead #define.

It used the wrong tests, anyway...

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/526993002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23542 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/base/build_config.h

@@ -158,10 +158,6 @@
 #error Unknown target architecture endianness
 #endif
 
-#if V8_OS_MACOSX || defined(__FreeBSD__) || defined(__OpenBSD__)
-#define USING_BSD_ABI
-#endif
-
 // Number of bits to represent the page size for paged spaces. The value of 20
 // gives 1Mb bytes per page.
 const int kPageSizeBits = 20;