mega-manual: Removed the concepts-manual.

The two chapters have been integrated into the current
getting-started manual.  Concepts manual is no longer in
existence.

(From yocto-docs rev: f8ee299901acb61d0e638ce9e36f30c5924f36d4)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/mega-manual/mega-manual.xml

@@ -156,12 +156,6 @@
     <xi:include
         xmlns:xi="http://www.w3.org/2003/XInclude" href="../getting-started/getting-started-development-environment.xml"/>
 
-<!-- Includes concepts-manual title image and then concepts-manual chapters -->
-
-    <para>
-        <imagedata fileref="figures/concepts-manual-title.png" width="100%" align="left" scalefit="1" />
-    </para>
-
     <xi:include
         xmlns:xi="http://www.w3.org/2003/XInclude" href="../concepts-manual/concepts-manual-intro.xml"/>