Remove PQhostaddr() from 9.4 release notes.

Back-patch to 9.4, like the feature's removal.

doc/src/sgml/release-9.4.sgml

@@ -1841,14 +1841,6 @@
     <title><link linkend="libpq"><application>libpq</></link></title>
      <itemizedlist>
 
-      <listitem>
-       <para>
-        Add libpq function <link
-        linkend="libpq-pqhostaddr"><function>PQhostaddr()</></link>
-        to return the server's <acronym>IP</> address (Fujii Masao)
-       </para>
-      </listitem>
-
       <listitem>
        <para>
         Make libpq's <link