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diff --git a/ghc/runtime/gmp/mpz_div_2exp.c b/ghc/runtime/gmp/mpz_div_2exp.c
deleted file mode 100644
index de67f2f..0000000
--- a/ghc/runtime/gmp/mpz_div_2exp.c
+++ /dev/null
@@ -1,53 +0,0 @@
-/* mpz_div_2exp -- Divide a bignum by 2**CNT
-
-Copyright (C) 1991 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 General Public License as published by
-the Free Software Foundation; either version 2, 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 General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with the GNU MP Library; see the file COPYING.  If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
-#include "gmp.h"
-#include "gmp-impl.h"
-
-void
-#ifdef __STDC__
-mpz_div_2exp (MP_INT *w, const MP_INT *u, unsigned long int cnt)
-#else
-mpz_div_2exp (w, u, cnt)
-     MP_INT *w;
-     const MP_INT *u;
-     unsigned long int cnt;
-#endif
-{
-  mp_size usize = u->size;
-  mp_size wsize;
-  mp_size abs_usize = ABS (usize);
-  mp_size limb_cnt;
-
-  limb_cnt = cnt / BITS_PER_MP_LIMB;
-  wsize = abs_usize - limb_cnt;
-  if (wsize <= 0)
-    wsize = 0;
-  else
-    {
-      if (w->alloc < wsize)
-	_mpz_realloc (w, wsize);
-
-      wsize = mpn_rshift (w->d, u->d + limb_cnt, abs_usize - limb_cnt,
-			   cnt % BITS_PER_MP_LIMB);
-    }
-
-  w->size = (usize >= 0) ? wsize : -wsize;
-}