python-packages.nix: unsubscribe myself from some Hydra mails

pkgs/top-level/python-packages.nix

···
     meta = {
       description = "automatically generated zsh completion function for Python's option parser modules";
       license = "BSD";
-      maintainers = [ stdenv.lib.maintainers.simons ];
     };
   };
 
···
     meta = with stdenv.lib; {
       description = "python plotting library, making publication quality plots";
       homepage    = "http://matplotlib.sourceforge.net/";
-      maintainers = with maintainers; [ lovek323 simons ];
+      maintainers = with maintainers; [ lovek323 ];
       platforms   = platforms.unix;
     };
   });
···
         does it require C extensions to be compiled. It should work on
         any platform that supports the standard Python pty module.
       '';
-
-      maintainers = [ stdenv.lib.maintainers.simons ];
     };
   };