Revert "Add m4_argn macro for compatibility with older autoconf"

This reverts commit 8601785.

Author: dex4er

autogen.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # Depends: libtool (>= 2.0), automake (>= 1.10)
 

m4/check_func_argtypes.m4

@@ -7,13 +7,6 @@
 # License as published by the Free Software Foundation; either
 # version 2.1 of the License, or (at your option) any later version.
 
-
-# Compatibility with older autoconf
-m4_ifndef([m4_argn],
-        [m4_define([m4_argn],
-                [m4_car(m4_shiftn([$1], $@))])])
-
-
 # _AH_CHECK_FUNC_ARGTYPES(FUNCTION-NAME, TYPES-RETURN, [TYPES-ARG1,
 #     TYPES_ARG2, ...])
 # -----------------------------------------------------------------
@@ -31,12 +24,10 @@ m4_define([_AH_CHECK_FUNC_ARGTYPES],
                                 m4_undefine([myargi])
                                 m4_undefine([myname])])])])])
 
-
 # _AC_CHECK_FUNC_ARGTYPES_QUOTE(STRING)
 # -------------------------------------
 m4_define([_AC_CHECK_FUNC_ARGTYPES_QUOTE], [m4_join([], ['], AS_ESCAPE($1, ['']), ['], [ ])])
 
-
 # AC_CHECK_FUNC_ARGTYPES(FUNCTION-NAME, HEADER-FILES, PROLOGUE, TYPES-DEFAULT,
 #     TYPES-RETURN, TYPES-ARG1, TYPES-ARG2, ...])
 # ----------------------------------------------------------------------------