Committers guide: remove about hrs being maintainer of relnotes

We now use 'relnotes: yes' instead of a manual email to an individual.
Catch up to this.

en_US.ISO8859-1/articles/committers-guide/article.xml

@@ -2925,12 +2925,6 @@ Relnotes:           yes</programlisting>
 	    there is something you want merged from &os.current; to
 	    &os.stable; (whatever values those may have at any given
 	    time), these are the people to talk to about it.</para>
-
-	  <para>Hiroki is also the keeper of the release documentation
-	    (<filename>src/release/doc/*</filename>).  If you commit a
-	    change that you think is worthy of mention in the release
-	    notes, please make sure he knows about it.  Better still,
-	    send him a patch with your suggested commentary.</para>
 	</listitem>
       </varlistentry>