ia64: Remove fcopysign{f} implementation

The builtin used by generic code generates similar code.

Checked on ia64-linux-gnu.

sysdeps/ia64/fpu/s_copysign.S

@@ -1,37 +0,0 @@
-/* Copyright (C) 2000-2022 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C 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 C 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 C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <sysdep.h>
-#undef ret
-
-ENTRY (__copysign)
-{
-	fmerge.s fret0 = farg1, farg0
-	br.ret.sptk.many rp
-}
-END (__copysign)
-
-strong_alias (__copysign, __copysignf)
-strong_alias (__copysign, __copysignl)
-
-strong_alias (__copysign, __libm_copysign)
-strong_alias (__copysign, __libm_copysignf)
-strong_alias (__copysign, __libm_copysignl)
-
-libm_alias_double (__copysign, copysign)
-libm_alias_float (__copysign, copysign)
-libm_alias_ldouble (__copysign, copysign)

sysdeps/ia64/fpu/s_copysignf.S

@@ -1 +0,0 @@
-/* __copysignf is in s_copysign.S. */

sysdeps/ia64/fpu/s_copysignl.S

@@ -1 +0,0 @@
-/* __copysignl is in s_copysign.S. */