Merge pull request #200218 from Ma27/rm-kernel-4.9

linux_4_9: remove

nixos/doc/manual/from_md/release-notes/rl-2211.section.xml

@@ -861,6 +861,12 @@
           for <literal>termonad</literal> has been removed.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          Linux 4.9 has been removed because it will reach its end of
+          life within the lifespan of 22.11.
+        </para>
+      </listitem>
       <listitem>
         <para>
           (Neo)Vim can not be configured with

nixos/doc/manual/release-notes/rl-2211.section.md

@@ -265,6 +265,8 @@ Available as [services.patroni](options.html#opt-services.patroni.enable).
 
 - The top-level `termonad-with-packages` alias for `termonad` has been removed.
 
+- Linux 4.9 has been removed because it will reach its end of life within the lifespan of 22.11.
+
 - (Neo)Vim can not be configured with `configure.pathogen` anymore to reduce maintainance burden.
   Use `configure.packages` instead.
 - Neovim can not be configured with plug anymore (still works for vim).