This isn't needed if ABI_CallFunction* is used.

AFAICT the only reason for it is to avoid far calls, so we just can't
use CALL() directly.  It's works even when it throws on Mac.

Common/MemoryUtil.cpp

@@ -119,11 +119,6 @@ void* AllocateExecutableMemory(size_t size, bool low)
 	}
 #endif
 
-#if defined(_M_X64)
-	if ((u64)ptr >= 0x80000000 && low == true)
-		PanicAlert("Executable memory ended up above 2GB!");
-#endif
-
 	return ptr;
 }