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diff --git a/lib/libm/common_source/atan.c b/lib/libm/common_source/atan.c
deleted file mode 100644
index 7565c71..0000000
--- a/lib/libm/common_source/atan.c
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Copyright (c) 1985, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by the University of
- *	California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#ifndef lint
-static char sccsid[] = "@(#)atan.c	8.1 (Berkeley) 6/4/93";
-#endif /* not lint */
-
-/* ATAN(X)
- * RETURNS ARC TANGENT OF X
- * DOUBLE PRECISION (IEEE DOUBLE 53 bits, VAX D FORMAT 56 bits)
- * CODED IN C BY K.C. NG, 4/16/85, REVISED ON 6/10/85.
- *
- * Required kernel function:
- *	atan2(y,x)
- *
- * Method:
- *	atan(x) = atan2(x,1.0).
- *
- * Special case:
- *	if x is NaN, return x itself.
- *
- * Accuracy:
- * 1)  If atan2() uses machine PI, then
- *
- *	atan(x) returns (PI/pi) * (the exact arc tangent of x) nearly rounded;
- *	and PI is the exact pi rounded to machine precision (see atan2 for
- *      details):
- *
- *	in decimal:
- *		pi = 3.141592653589793 23846264338327 .....
- *    53 bits   PI = 3.141592653589793 115997963 ..... ,
- *    56 bits   PI = 3.141592653589793 227020265 ..... ,
- *
- *	in hexadecimal:
- *		pi = 3.243F6A8885A308D313198A2E....
- *    53 bits   PI = 3.243F6A8885A30  =  2 * 1.921FB54442D18	error=.276ulps
- *    56 bits   PI = 3.243F6A8885A308 =  4 * .C90FDAA22168C2    error=.206ulps
- *
- *	In a test run with more than 200,000 random arguments on a VAX, the
- *	maximum observed error in ulps (units in the last place) was
- *	0.86 ulps.      (comparing against (PI/pi)*(exact atan(x))).
- *
- * 2)  If atan2() uses true pi, then
- *
- *	atan(x) returns the exact atan(x) with error below about 2 ulps.
- *
- *	In a test run with more than 1,024,000 random arguments on a VAX, the
- *	maximum observed error in ulps (units in the last place) was
- *	0.85 ulps.
- */
-
-double atan(x)
-double x;
-{
-	double atan2(),one=1.0;
-	return(atan2(x,one));
-}