pmt: revert 7f8090b

include/libgnulib/unistr/u-strdup.h

@@ -1,49 +0,0 @@
-/* Copy UTF-8/UTF-16/UTF-32 string.
-   Copyright (C) 1999, 2002, 2006-2007, 2009-2024 Free Software Foundation,
-   Inc.
-   Written by Bruno Haible <bruno@clisp.org>, 2002.
-
-   This file is free software.
-   It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
-   You can redistribute it and/or modify it under either
-     - the terms of the GNU Lesser General Public License as published
-       by the Free Software Foundation, either version 3, or (at your
-       option) any later version, or
-     - 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, or
-     - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
-
-   This file 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 and the GNU General Public License
-   for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License and of the GNU General Public License along with this
-   program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-#include <stdlib.h>
-#include <string.h>
-
-UNIT *
-FUNC (const UNIT *s)
-{
-  size_t n = U_STRLEN (s) + 1;
-  UNIT *dest;
-
-  dest = (UNIT *) malloc (n * sizeof (UNIT));
-  if (dest != NULL)
-    {
-#if 0
-      UNIT *destptr = dest;
-
-      for (; n > 0; n--)
-        *destptr++ = *s++;
-#else
-      memcpy ((char *) dest, (const char *) s, n * sizeof (UNIT));
-#endif
-    }
-  return dest;
-}