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diff --git a/src/ceph/src/common/compiler_extensions.h b/src/ceph/src/common/compiler_extensions.h
deleted file mode 100644
index 2fd8f5c..0000000
--- a/src/ceph/src/common/compiler_extensions.h
+++ /dev/null
@@ -1,30 +0,0 @@
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2011 New Dream Network
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation.  See file COPYING.
- *
- */
-
-#ifndef CEPH_COMPILER_EXTENSIONS_H
-#define CEPH_COMPILER_EXTENSIONS_H
-
-/* We should be able to take advantage of nice nonstandard features of gcc
- * and other compilers, but still maintain portability.
- */
-
-#ifdef __GNUC__
-// GCC
-#define WARN_UNUSED_RESULT __attribute__((warn_unused_result))
-#else
-// some other compiler - just make it a no-op
-#define WARN_UNUSED_RESULT
-#endif
-
-#endif