ref-manual: Removed FAQ entry about running on RHEL/CentOS 5.1.

We don't even support these Linux distributions.  We should not
have a FAQ entry telling people how to deal with it. If the
distro is that "hot", we should take steps to support it.

(From yocto-docs rev: b2f77f048da82becb590f948c41e94598817b4ee)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/faq.xml

@@ -199,7 +199,7 @@
         </answer>
     </qandaentry>
 
-    <qandaentry>
+<!--    <qandaentry>
         <question>
             <para>
                 How do I make the Yocto Project work in RHEL/CentOS?
@@ -246,7 +246,7 @@
                 Wiki page.</para>
             </note>
         </answer>
-    </qandaentry>
+    </qandaentry> -->
 
     <qandaentry>
         <question>