[gimp-help-2] Remove Posterize from the list of tools

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 14cf5ac11ee701148d067be0e9f4a2562b312e82
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Sun Jan 29 16:23:13 2017 +0300

    Remove Posterize from the list of tools

 src/menus/colors/tools.xml |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)
---
diff --git a/src/menus/colors/tools.xml b/src/menus/colors/tools.xml
index 98cc33f..63da769 100644
--- a/src/menus/colors/tools.xml
+++ b/src/menus/colors/tools.xml
@@ -2,6 +2,7 @@
 <!DOCTYPE sect2 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
                        "http://www.docbook.org/xml/4.3/docbookx.dtd";>
 <!-- section history:
+  2017-01-29 Removed Posterize form the list of tools, it's a plug-in now
   2007-10-16 ude: created 'en','de' (copied from
              "menus/tools-introduction.xml" and "toolbox/tools-color.xml")
 -->
@@ -57,10 +58,5 @@
         <xref linkend="gimp-tool-curves"/>
       </para>
     </listitem>
-    <listitem>
-      <para>
-        <xref linkend="plug-in-posterize"/>
-      </para>
-    </listitem>
   </itemizedlist>
 </sect2>