Adds note about Navigator removal in docs

Fixes eclipse-platform/eclipse.platform.ui#644

bundles/org.eclipse.platform.doc.isv/porting/removals.html

@@ -173,17 +173,6 @@ <h3 id="commands">1. Delete deprecated contents of org.eclipse.ui.commands packa
 For further details or to provide feedback on this change, see <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=431177" target="_blank">bug 431177</a>.
 </p>
 
-<!-- ############################################## -->
-<h2>API removals after September 2021</h2>
-
-<h3 id="navigator">1. Navigator view and related API</h3>
-
-Navigator view (ResourceNavigator impl) and related API is marked for deletion.
-
-<p>
-For further details or to provide feedback on this change, see <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=550379" target="_blank">bug 550379</a>.
-</p>
-
 <!-- ############################################## -->
 <h2>API removals after May 2022</h2>
 
@@ -588,6 +577,15 @@ <h3 id="encodingactiongroup">1. org.eclipse.ui.editors.text.EncodingActionGroup
 Actual removal has been completed via <a href="https://github.com/eclipse-platform/eclipse.platform.text/pull/160"> pull 160 in platform.text repository</a>
 </p>
 
+<h3 id="navigator">2. Navigator view and related API</h3>
+
+Navigator view (ResourceNavigator impl) and related API is marked for deletion.
+
+<p>
+For further details or to provide feedback on this change, see <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=550379" target="_blank">bug 550379</a>.
+Actual removal has been completed via <a href="https://github.com/eclipse-platform/eclipse.platform.ui/pull/647"> pull 647 in platform.ui repository</a>
+</p>
+
 
 </body>
 </html>