Remove configure probe for shl_load library.

This was needed only by HP-UX 10, so it became redundant with commit
9db300ce.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CA%2BhUKG%2BL_3brvh%3D8e0BW_VfX9h7MtwgN%3DnFHP5o7X2oZucY9dg%40mail.gmail.com

configure

@@ -12034,62 +12034,6 @@ if test "$ac_res" != no; then :
 
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing shl_load" >&5
-$as_echo_n "checking for library containing shl_load... " >&6; }
-if ${ac_cv_search_shl_load+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_func_search_save_LIBS=$LIBS
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char shl_load ();
-int
-main ()
-{
-return shl_load ();
-  ;
-  return 0;
-}
-_ACEOF
-for ac_lib in '' dld; do
-  if test -z "$ac_lib"; then
-    ac_res="none required"
-  else
-    ac_res=-l$ac_lib
-    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
-  fi
-  if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_search_shl_load=$ac_res
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext
-  if ${ac_cv_search_shl_load+:} false; then :
-  break
-fi
-done
-if ${ac_cv_search_shl_load+:} false; then :
-
-else
-  ac_cv_search_shl_load=no
-fi
-rm conftest.$ac_ext
-LIBS=$ac_func_search_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_shl_load" >&5
-$as_echo "$ac_cv_search_shl_load" >&6; }
-ac_res=$ac_cv_search_shl_load
-if test "$ac_res" != no; then :
-  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
-
-fi
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing getopt_long" >&5
 $as_echo_n "checking for library containing getopt_long... " >&6; }
 if ${ac_cv_search_getopt_long+:} false; then :

configure.ac

@@ -1248,7 +1248,6 @@ AC_SEARCH_LIBS(setproctitle, util)
 # required. Just checking for dlsym() ought to suffice.
 AC_SEARCH_LIBS(dlsym, dl)
 AC_SEARCH_LIBS(socket, [socket ws2_32])
-AC_SEARCH_LIBS(shl_load, dld)
 AC_SEARCH_LIBS(getopt_long, [getopt gnugetopt])
 AC_SEARCH_LIBS(shm_open, rt)
 AC_SEARCH_LIBS(shm_unlink, rt)