diff --git a/include/llvm/Config/unistd.h b/include/llvm/Config/unistd.h
deleted file mode 100644
index d6e90d0f9f4..00000000000
--- a/include/llvm/Config/unistd.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/* 
- *                     The LLVM Compiler Infrastructure
- *
- * This file was developed by the LLVM research group and is distributed under
- * the University of Illinois Open Source License. See LICENSE.TXT for details.
- * 
- *===----------------------------------------------------------------------===//
- *
- * Description:
- *	This header file is the autoconf replacement for unistd.h (if it lives
- *	on the system).
- */
-
-#ifndef _CONFIG_UNISTD_H
-#define _CONFIG_UNISTD_H
-
-#include "llvm/Config/config.h"
-
-#if defined(HAVE_UNISTD_H) && !defined(_MSC_VER)
-#include <unistd.h>
-#endif
-
-#ifdef _WIN32
-#include <process.h>
-#include <io.h>
-#endif
-
-#endif