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diff --git a/ghc/runtime/gmp/mpz_mod_ui.c b/ghc/runtime/gmp/mpz_mod_ui.c
deleted file mode 100644
index 35a4d7d..0000000
--- a/ghc/runtime/gmp/mpz_mod_ui.c
+++ /dev/null
@@ -1,65 +0,0 @@
-/* mpz_mod_ui(rem, dividend, divisor_limb)
-   -- Set REM to DIVDEND mod DIVISOR_LIMB.
-
-Copyright (C) 1991, 1992 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"
-#include "longlong.h"
-
-void
-#ifdef __STDC__
-mpz_mod_ui (MP_INT *rem, const MP_INT *dividend,
-	    unsigned long int divisor_limb)
-#else
-mpz_mod_ui (rem, dividend, divisor_limb)
-     MP_INT *rem;
-     const MP_INT *dividend;
-     unsigned long int divisor_limb;
-#endif
-{
-  mp_size sign_dividend;
-  mp_size dividend_size;
-  mp_limb remainder_limb;
-
-  sign_dividend = dividend->size;
-  dividend_size = ABS (dividend->size);
-
-  if (dividend_size == 0)
-    {
-      rem->size = 0;
-      return;
-    }
-
-  /* No need for temporary allocation and copying if QUOT == DIVIDEND as
-     the divisor is just one limb, and thus no intermediate remainders
-     need to be stored.  */
-
-  remainder_limb = mpn_mod_1 (dividend->d, dividend_size, divisor_limb);
-
-  if (remainder_limb == 0)
-    rem->size = 0;
-  else
-    {
-      /* Store the single-limb remainder.  We don't check if there's space
-	 for just one limb, since no function ever makes zero space.  */
-      rem->size = sign_dividend >= 0 ? 1 : -1;
-      rem->d[0] = remainder_limb;
-    }
-}