elf: Remove _dl_sysdep_open_object hook function

It is currently not used by any target.

elf/dl-load.c

@@ -72,7 +72,6 @@ struct filebuf
 #include <dl-map-segments.h>
 #include <dl-unmap-segments.h>
 #include <dl-machine-reject-phdr.h>
-#include <dl-sysdep-open.h>
 #include <dl-prop.h>
 #include <not-cancel.h>
 
@@ -2091,20 +2090,6 @@ _dl_map_object (struct link_map *loader, const char *name,
 			&loader->l_runpath_dirs, &realname, &fb, loader,
 			LA_SER_RUNPATH, &found_other_class);
 
-      if (fd == -1)
-        {
-          realname = _dl_sysdep_open_object (name, namelen, &fd);
-          if (realname != NULL)
-            {
-              fd = open_verify (realname, fd,
-                                &fb, loader ?: GL(dl_ns)[nsid]._ns_loaded,
-                                LA_SER_CONFIG, mode, &found_other_class,
-                                false);
-              if (fd == -1)
-                free (realname);
-            }
-        }
-
 #ifdef USE_LDCONFIG
       if (fd == -1
 	  && (__glibc_likely ((mode & __RTLD_SECURE) == 0)

elf/dl-sysdep-open.h

@@ -1,45 +0,0 @@
-/* System-specific call to open a shared object by name.  Stub version.
-   Copyright (C) 2015-2024 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/>.  */
-
-#ifndef _DL_SYSDEP_OPEN_H
-#define _DL_SYSDEP_OPEN_H	1
-
-#include <assert.h>
-#include <stddef.h>
-
-/* NAME is a name without slashes, as it appears in a DT_NEEDED entry
-   or a dlopen call's argument or suchlike.  NAMELEN is (strlen (NAME) + 1).
-
-   Find NAME in an OS-dependent fashion, and return its "real" name.
-   Optionally fill in *FD with a file descriptor open on that file (or
-   else leave its initial value of -1).  The return value is a new
-   malloc'd string, which will be free'd by the caller.  If NAME is
-   resolved to an actual file that can be opened, then the return
-   value should name that file (and if *FD was not set, then a normal
-   __open call on that string will be made).  If *FD was set by some
-   other means than a normal open and there is no "real" name to use,
-   then __strdup (NAME) is fine (modulo error checking).  */
-
-static inline char *
-_dl_sysdep_open_object (const char *name, size_t namelen, int *fd)
-{
-  assert (*fd == -1);
-  return NULL;
-}
-
-#endif  /* dl-sysdep-open.h */