[NaCl SDK] Remove syscalls wrappers for chmod and unlink.

native_client_sdk/src/libraries/nacl_io/syscalls/unlink.c

Index: native_client_sdk/src/libraries/nacl_io/syscalls/unlink.c
diff --git a/native_client_sdk/src/libraries/nacl_io/syscalls/unlink.c b/native_client_sdk/src/libraries/nacl_io/syscalls/unlink.c
deleted file mode 100644
index e539a91ef43cf1ac331531d0f335d5c119128c2c..0000000000000000000000000000000000000000
--- a/native_client_sdk/src/libraries/nacl_io/syscalls/unlink.c
+++ /dev/null
@@ -1,12 +0,0 @@
-/* Copyright (c) 2013 The Chromium Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file. */
-
-#include "nacl_io/kernel_intercept.h"
-#include "nacl_io/kernel_wrap.h"
-
-#ifndef __GLIBC__
-int unlink(const char* path) {
-  return ki_unlink(path);
-}
-#endif