diff --git a/sys/arch/sh3/sh3/in_cksum.c b/sys/arch/sh3/sh3/in_cksum.c
deleted file mode 100644
index ab105a8a4f0f..000000000000
--- a/sys/arch/sh3/sh3/in_cksum.c
+++ /dev/null
@@ -1,87 +0,0 @@
-/*	$NetBSD: in_cksum.c,v 1.1 1999/09/13 10:31:29 itojun Exp $	*/
-
-/*
- * Copyright (C) 1995, 1996 Wolfgang Solfrank.
- * Copyright (C) 1995, 1996 TooLs GmbH.
- * 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 TooLs GmbH.
- * 4. The name of TooLs GmbH may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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/param.h>
-#include <sys/mbuf.h>
-
-/*
- * First cut for in_cksum.
- * This code is in C and should be optimized for PPC later.
- */
-#define	REDUCE		(sum = (sum & 0xffff) + (sum >> 16))
-#define	ROL		(sum = sum << 8)
-#define	ADDB		(ROL, sum += *w, byte_swapped ^= 1)
-#define	ADDS		(sum += htons(*(u_short *)w))
-#define	SHIFT(n)	(w += (n), mlen -= (n))
-#define	ADDCARRY	do { while (sum > 0xffff) REDUCE; } while (0)
-
-int
-in_cksum __P ((struct mbuf *m, int len));
-
-int
-in_cksum(m, len)
-	struct mbuf *m;
-	int len;
-{
-	u_char *w;
-	u_int sum = 0;
-	int mlen;
-	int byte_swapped = 0;
-
-	for (; m && len; m = m->m_next) {
-		if (m->m_len == 0)
-			continue;
-		w = mtod(m, u_char *);
-		mlen = m->m_len;
-		if (len < mlen)
-			mlen = len;
-		len -= mlen;
-		if ((long)w & 1) {
-			REDUCE;
-			ADDB;
-			SHIFT(1);
-		}
-		while (mlen >= 2) {
-			ADDS;
-			SHIFT(2);
-		}
-		REDUCE;
-		if (mlen == 1)
-			ADDB;
-	}
-	if (byte_swapped) {
-		REDUCE;
-		ROL;
-	}
-	ADDCARRY;
-	return sum ^ 0xffff;
-}