news.xml: Restore blank news example

In v5.6.0-rc1~347 I've mistakenly messed up news.xml as the
change I wanted to promote was added into a comment (I blame git
rebase for that). Anyway, restore the original state of the
comment so it can be copied again.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

docs/news.xml

@@ -25,19 +25,6 @@
     <section title="New features">
     </section>
     <section title="Improvements">
-      <change>
-        <summary>
-          Remember original owners and SELinux labels of files
-        </summary>
-        <description>
-          When a domain is starting up libvirt changes DAC and
-          SELinux labels so that domain can access it. However,
-          it never remembered the original labels and therefore
-          the file was returned back to <code>root:root</code>.
-          With this release, the original labels are remembered
-          and restored properly.
-        </description>
-      </change>
     </section>
     <section title="Bug fixes">
     </section>