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diff --git a/ghc/rts/gmp/mpn/arm/sub_n.S b/ghc/rts/gmp/mpn/arm/sub_n.S
deleted file mode 100644
index 856505f..0000000
--- a/ghc/rts/gmp/mpn/arm/sub_n.S
+++ /dev/null
@@ -1,79 +0,0 @@
-@ ARM mpn_sub -- Subtract two limb vectors of the same length > 0 and store
-@ difference in a third limb vector.
-@ Contributed by Robert Harley.
-
-@ Copyright (C) 1997, 2000 Free Software Foundation, Inc.
-
-@ This file is part of the GNU MP Library.
-
-@ The GNU MP Library is free software; you can redistribute it and/or modify
-@ it under the terms of the GNU Lesser General Public License as published by
-@ the Free Software Foundation; either version 2.1 of the License, or (at your
-@ option) any later version.
-
-@ The GNU MP 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 Lesser General Public
-@ License for more details.
-
-@ You should have received a copy of the GNU Lesser General Public License
-@ along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
-@ the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
-@ MA 02111-1307, USA.
-
-#define d r0
-#define a r1
-#define b r2
-#define n r3
-
-#define sl r10
-#define fp r11
-#define ip r12
-#define sp r13
-#define lr r14
-#define pc r15
-
-.text
-	.align	0
-	.global	__gmpn_sub_n
-	.type	__gmpn_sub_n,%function
-__gmpn_sub_n:
-	stmfd	sp!, { r8, r9, lr }
-	subs	ip, ip, ip
-	tst	n, #1
-	beq	skip1
-	ldr	ip, [a], #4
-	ldr	lr, [b], #4
-	subs	ip, ip, lr
-	str	ip, [d], #4
-skip1:
-	tst	n, #2
-	beq	skip2
-	ldmia	a!, { r8, r9 }
-	ldmia	b!, { ip, lr }
-	sbcs	r8, r8, ip
-	sbcs	r9, r9, lr
-	stmia	d!, { r8, r9 }
-skip2:
-	bics	n, n, #3
-	beq	return
-	stmfd	sp!, { r4, r5, r6, r7 }
-sub_n_loop:
-	ldmia	a!, { r4, r5, r6, r7 }
-	ldmia	b!, { r8, r9, ip, lr }
-	sbcs	r4, r4, r8
-	ldr	r8, [d] /* Bring stuff into cache. */
-	sbcs	r5, r5, r9
-	sbcs	r6, r6, ip
-	sbcs	r7, r7, lr
-	stmia	d!, { r4, r5, r6, r7 }
-	sub	n, n, #4
-	teq	n, #0
-	bne	sub_n_loop
-	ldmfd	sp!, { r4, r5, r6, r7 }
-return:
-	sbc	r0, r0, r0
-	and	r0, r0, #1
-	ldmfd	sp!, { r8, r9, pc }
-end:
-	.size	__gmpn_sub_n, end - __gmpn_sub_n