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diff --git a/lib/mlibc/options/ansi/generic/complex/casinh.c b/lib/mlibc/options/ansi/generic/complex/casinh.c
deleted file mode 100644
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--- a/lib/mlibc/options/ansi/generic/complex/casinh.c
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@@ -1,97 +0,0 @@
-/* $NetBSD: casinh.c,v 1.1 2007/08/20 16:01:31 drochner Exp $ */
-
-/*-
- * Copyright (c) 2007 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software written by Stephen L. Moshier.
- * It is redistributed by the NetBSD Foundation by permission of the author.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * imported and modified include for newlib 2010/10/03 
- * Marco Atzeri <marco_atzeri@yahoo.it>
- */
-
-/*
-FUNCTION
-        <<casinh>>, <<casinhf>>---complex arc hyperbolic sine
-
-INDEX
-        casinh
-INDEX
-        casinhf
-
-ANSI_SYNOPSIS
-       #include <complex.h>
-       double complex casinh(double complex <[z]>);
-       float complex casinhf(float complex <[z]>);
-
-
-DESCRIPTION
-        @ifnottex
-        These functions compute the complex arc hyperbolic sine of <[z]>,
-        with branch cuts outside the interval [-i, +i] along the 
-        imaginary axis.        
-        @end ifnottex
-        @tex
-        These functions compute the complex arc hyperbolic sine of <[z]>,
-        with branch cuts outside the interval [$-i$, $+i$] along the 
-        imaginary axis.        
-        @end tex
-
-        <<casinhf>> is identical to <<casinh>>, except that it performs
-        its calculations on <<floats complex>>.
-
-RETURNS
-        @ifnottex
-        These functions return the complex arc hyperbolic sine value, 
-        in the range of a strip mathematically unbounded along the 
-        real axis and in the interval [-i*p/2, +i*p/2] along the 
-        imaginary axis.
-        @end ifnottex
-        @tex
-        These functions return the complex arc hyperbolic sine value, 
-        in the range of a strip mathematically unbounded along the 
-        real axis and in the interval [$-i\pi/2$, $+i\pi/2$] along the 
-        imaginary axis.
-        @end tex
-
-PORTABILITY
-        <<casinh>> and <<casinhf>> are ISO C99
-
-QUICKREF
-        <<casinh>> and <<casinhf>> are ISO C99
-
-*/
-
-
-#include <complex.h>
-
-double complex
-casinh(double complex z)
-{
-	double complex w;
-
-	w = -1.0 * I * casin(z * I);
-	return w;
-}