fix: remove need and definition of HAVE_SOCKLEN_T symbol

acinclude.m4

@@ -244,8 +244,6 @@ AC_DEFUN([CURL_CHECK_TYPE_SOCKLEN_T], [
   AC_REQUIRE([CURL_CHECK_HEADER_WS2TCPIP])dnl
   AC_CHECK_TYPE([socklen_t], [
     dnl socklen_t is available
-    AC_DEFINE_UNQUOTED(HAVE_SOCKLEN_T, 1,
-      [Define to 1 if socklen_t is available or a equivalent is defined.])
   ],[
     dnl socklen_t not available
     AC_CACHE_CHECK([for socklen_t equivalent],
@@ -299,8 +297,6 @@ AC_DEFUN([CURL_CHECK_TYPE_SOCKLEN_T], [
       *)
         AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv,
           [Type to use in place of socklen_t when system does not provide it.])
-        AC_DEFINE_UNQUOTED(HAVE_SOCKLEN_T, 1,
-          [Define to 1 if socklen_t is available or a equivalent is defined.])
         ;;
     esac
   ],[

setup_once.h

@@ -100,11 +100,10 @@ struct timeval {
  * definition is present the other one also is available.
  */
 
-#if defined(WIN32) && !defined(HAVE_SOCKLEN_T)
+#if defined(WIN32) && !defined(HAVE_CONFIG_H)
 #  if ( defined(_MSC_VER) && !defined(INET_ADDRSTRLEN) ) || \
       (!defined(_MSC_VER) && !defined(HAVE_WS2TCPIP_H) )
 #    define socklen_t int
-#    define HAVE_SOCKLEN_T
 #  endif
 #endif