remove outdated upgrade information

xml/art_sle_ha_pmremote.xml

@@ -770,47 +770,19 @@ Failed Actions:
    https://wiki.clusterlabs.org/wiki/Upgrading_to_Pacemaker_1.1.15_or_later_from_an_earlier_version
   is not needed, because we did a maintenance update for SP1 to make the
   rolling upgrade easier-->
-  <para>
-   Find comprehensive information on different scenarios and supported upgrade
-   paths in the <citetitle>Admin Guide</citetitle> for &productname;,
-   chapter <citetitle>Upgrading Your Cluster and Updating Software Packages</citetitle>.
-   It is available from <link
-   xlink:href="https://www.suse.com/documentation/sle-ha-12"/>.
-   </para>
-   <para>A rolling upgrade is supported when &pmremote; is used.
-   To upgrade your cluster and &pmrm; nodes, do the following:
-  </para>
-  <procedure>
-   <step>
-    <para>
-     For a rolling upgrade from &sle; and &productname; 12 SP1 to 12 SP2:
-     Make sure to upgrade your remote nodes to the latest &productname; 12
-     SP1 maintenance update.
-    </para>
-   </step>
-   <step>
-    <para>
-     Upgrade all cluster nodes to &sle; &productnumber; and &productname;
-     &productnumber; one by one.
-    </para>
-   </step>
-   <step>
-    <para>
-     Upgrade all &pmrm; nodes to &sle; &productnumber; one by one and make sure
+   <para>
+    Upgrade all &pmrm; nodes to &sle; &productnumber; one by one and make sure
      &productname; &productnumber; has been added as extension. Update the
      packages <systemitem class="resource">pacemaker-remote</systemitem> and
-     <systemitem class="resource">crmsh</systemitem> including their dependencies
-     as described in the <citetitle>Admin Guide</citetitle> for &productname;,
+     <systemitem class="resource">crmsh</systemitem> including their
+     dependencies. For details, see the <citetitle>Admin Guide</citetitle> for &productname;,
      section <citetitle>Updating Software Packages on Cluster Nodes</citetitle>.
-    </para>
-   </step>
-  </procedure>
-  <!--
-  <para>
-   In the future, rolling upgrades from SP2 to SP3 needs only the last two
-   steps.
-  </para>
-  -->
+     It is available from <link 
+      xlink:href="https://www.suse.com/documentation/sle-ha-12"/>.</para>
+     <para>
+    It also lists different scenarios and supported upgrade
+    paths in chapter <citetitle>Upgrading Your Cluster and Updating Software Packages</citetitle>.
+   </para>
  </sect1>
  <xi:include href="common_copyright_quick.xml"/>
  <xi:include href="common_legal.xml"/>