Remove incorrect name from release notes

This name was incorrect in the underlying commit message.  (The
correct name is already listed.)

Reported-by: Denis Laxalde <denis.laxalde@dalibo.com>

doc/src/sgml/release-16.sgml

@@ -3965,7 +3965,6 @@ Author: Andres Freund <andres@anarazel.de>
     <member>Farias de Oliveira</member>
     <member>Florin Irion</member>
     <member>Franz-Josef Färber</member>
-    <member>Gabriele Varrazzo</member>
     <member>Garen Torikian</member>
     <member>Georgios Kokolatos</member>
     <member>Gilles Darold</member>