[ZF-11101] Removed the reference to Gdata_EventEntry's Hidden attribute from documentation page

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@23879 44c647ce-9c0f-0410-b52a-842ac1e357ba

documentation/manual/en/module_specs/Zend_Gdata_Calendar.xml

@@ -555,13 +555,6 @@ try {
 
                 <listitem>
                     <para>
-                        <firstterm>Hidden</firstterm>
-                        removes the event from the Google Calendar UI.
-                    </para>
-                </listitem>
-
-                <listitem>
-                    <para>
                         <firstterm>Transparency</firstterm>
                         indicates whether the event should be consume time on
                         the user's free/busy list.