documentation: Updates to cull out buried YP Website references.

With the redoing of the YP website, it was decided that the manuals
could only reference into the top-level and the top-level/documentation
URLs of the website.  I removed all references to areas such as
projects (e.g. Toaster, VM, etc.) and any other URL that was not
the top-level landing page or the documentation page.

(From yocto-docs rev: 2bd838f1a9fb2698bab098b13b76c8852853e0e7)

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

documentation/kernel-dev/kernel-dev-intro.xml

@@ -34,9 +34,7 @@
         Previous recipes in the release are refreshed and supported for at
         least one additional Yocto Project release.
         As they align, these previous releases are updated to include the
-        latest from the
-        <ulink url='&YOCTO_HOME_URL;/organization/long-term-support-initiative-ltsi'>Long Term Support Initiative</ulink>
-        (LTSI) project.
+        latest from the Long Term Support Initiative (LTSI) project.
         You can learn more about Yocto Linux kernels and LTSI in the
         "<link linkend='kernel-big-picture'>Yocto Project Kernel Development and Maintenance</link>"
         section.