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diff --git a/libstdc++-v3/config/os/irix/irix5.2/bits/atomicity.h b/libstdc++-v3/config/os/irix/irix5.2/bits/atomicity.h
deleted file mode 100644
index bac483e2..00000000
--- a/libstdc++-v3/config/os/irix/irix5.2/bits/atomicity.h
+++ /dev/null
@@ -1,50 +0,0 @@
-// Low-level functions for atomic operations: IRIX version  -*- C++ -*-
-
-// Copyright (C) 2001 Free Software Foundation, Inc.
-//
-// This file is part of the GNU ISO C++ Library.  This library is free
-// software; you can redistribute it and/or modify it under the
-// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 2, or (at your option)
-// any later version.
-
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING.  If not, write to the Free
-// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-// USA.
-
-// As a special exception, you may use this file as part of a free software
-// library without restriction.  Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License.  This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
-
-#ifndef _BITS_ATOMICITY_H
-#define _BITS_ATOMICITY_H	1
-
-#include <mutex.h>
-
-typedef long _Atomic_word;
-
-static inline _Atomic_word
-__exchange_and_add (_Atomic_word* __mem, int __val)
-{
-  return (_Atomic_word) test_then_add ((unsigned long*) __mem, __val);
-}
-
-
-static inline void
-__atomic_add (_Atomic_word* __mem, int __val)
-{
-  __exchange_and_add (__mem, __val);
-}
-
-#endif /* atomicity.h */