removed docs vor abandonded $smarty->undefined

docs/en/programmers/api-variables.xml

@@ -10,7 +10,6 @@
 &programmers.api-variables.variable-debugging;
 &programmers.api-variables.variable-debug-tpl;
 &programmers.api-variables.variable-debugging-ctrl;
-&programmers.api-variables.variable-undefined;
 &programmers.api-variables.variable-autoload-filters;
 &programmers.api-variables.variable-compile-check;
 &programmers.api-variables.variable-force-compile;

docs/en/programmers/api-variables/variable-undefined.xml

@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision$ -->
-     <sect1 id="variable.undefined">
-      <title>$undefined</title>
-      <para>
-       This sets the value of $undefined for Smarty, default is null.
-       Currently this is only used to set undefined variables in
-       $global_assign to a default value.
-      </para>
-</sect1>
-<!-- Keep this comment at the end of the file
-Local variables:
-mode: sgml
-sgml-omittag:t
-sgml-shorttag:t
-sgml-minimize-attributes:nil
-sgml-always-quote-attributes:t
-sgml-indent-step:1
-sgml-indent-data:t
-indent-tabs-mode:nil
-sgml-parent-document:nil
-sgml-default-dtd-file:"../../../../manual.ced"
-sgml-exposed-tags:nil
-sgml-local-catalogs:nil
-sgml-local-ecat-files:nil
-End:
-vim600: syn=xml fen fdm=syntax fdl=2 si
-vim: et tw=78 syn=sgml
-vi: ts=1 sw=1
--->