Remove dead link

Author: michael-o

src/site/site.xml

@@ -31,7 +31,6 @@ under the License.
       <item name="Goals" href="plugin-info.html"/>
       <item name="Usage" href="usage.html"/>
       <item name="FAQ" href="faq.html"/>
-      <item name="Release Notes" href="jira-report.html"/>
       <!-- According to https://issues.apache.org/jira/browse/MNGSITE-152 -->
       <item name="License" href="http://www.apache.org/licenses/"/>
       <item name="Download" href="download.html"/>