(AC_SEARCH_LIBS): Remove file/macro, now that

this replacement is no longer needed.  Besides, this macro has
no effect with autoconf-2.58, since its `undefine' is not honored.

m4/search-libs.m4

@@ -1,42 +0,0 @@
-#serial 5
-
-dnl A replacement for autoconf's macro by the same name.  This version
-dnl uses `ac_lib' rather than `i' for the loop variable, but more importantly
-dnl moves the ACTION-IF-FOUND ([$]3) into the inner `if'-block so that it is
-dnl run only if one of the listed libraries ends up being used (and not in
-dnl the `none required' case.
-dnl I hope it's only temporary while we wait for that version to be fixed.
-undefine([AC_SEARCH_LIBS])
-
-# AC_SEARCH_LIBS(FUNCTION, SEARCH-LIBS,
-#                [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
-#                [OTHER-LIBRARIES])
-# --------------------------------------------------------
-# Search for a library defining FUNC, if it's not already available.
-AC_DEFUN([AC_SEARCH_LIBS],
-[
-  AC_CACHE_CHECK([for library containing $1], [ac_cv_search_$1],
-  [
-    ac_func_search_save_LIBS=$LIBS
-    ac_cv_search_$1=no
-    AC_TRY_LINK_FUNC([$1], [ac_cv_search_$1='none required'])
-    if test "$ac_cv_search_$1" = no; then
-      for ac_lib in $2; do
-	LIBS="-l$ac_lib $5 $ac_func_search_save_LIBS"
-	AC_TRY_LINK_FUNC([$1], [ac_cv_search_$1="-l$ac_lib"; break])
-      done
-    fi
-    LIBS=$ac_func_search_save_LIBS
-  ])
-
-  if test "$ac_cv_search_$1" = no; then :
-    $4
-  else
-    if test "$ac_cv_search_$1" = 'none required'; then :
-      $4
-    else
-      LIBS="$ac_cv_search_$1 $LIBS"
-      $3
-    fi
-  fi
-])