Fix "Maintainer: " entry in the header

* lisp/org.el:
* lisp/org-table.el:
* lisp/org-list.el:
* lisp/org-attach.el:
* lisp/org-agenda.el: Fix "Maintainer: " entry in the header.

lisp/org-agenda.el

@@ -3,7 +3,6 @@
 ;; Copyright (C) 2004-2020 Free Software Foundation, Inc.
 
 ;; Author: Carsten Dominik <carsten at orgmode dot org>
-;; Maintainer: Bastien Guerry <bzg at gnu dot org>
 ;; Keywords: outlines, hypermedia, calendar, wp
 ;; Homepage: https://orgmode.org
 ;;

lisp/org-attach.el

@@ -3,7 +3,6 @@
 ;; Copyright (C) 2008-2020 Free Software Foundation, Inc.
 
 ;; Author: John Wiegley <johnw@newartisans.com>
-;; Maintainer: Bastien Guerry <bzg at gnu dot org>
 ;; Keywords: org data attachment
 ;; This file is part of GNU Emacs.
 ;;

lisp/org-list.el

@@ -4,7 +4,6 @@
 ;;
 ;; Author: Carsten Dominik <carsten at orgmode dot org>
 ;;	   Bastien Guerry <bzg@gnu.org>
-;; Maintainer: Bastien Guerry <bzg at gnu dot org>
 ;; Keywords: outlines, hypermedia, calendar, wp
 ;; Homepage: https://orgmode.org
 ;;

lisp/org-table.el

@@ -3,7 +3,6 @@
 ;; Copyright (C) 2004-2020 Free Software Foundation, Inc.
 
 ;; Author: Carsten Dominik <carsten at orgmode dot org>
-;; Maintainer: Bastien Guerry <bzg at gnu dot org>
 ;; Keywords: outlines, hypermedia, calendar, wp
 ;; Homepage: https://orgmode.org
 ;;

lisp/org.el

@@ -4,7 +4,7 @@
 ;; Copyright (C) 2004-2020 Free Software Foundation, Inc.
 ;;
 ;; Author: Carsten Dominik <carsten at orgmode dot org>
-;; Maintainer: Bastien Guerry <bzg at gnu dot org>
+;; Maintainer: Bastien Guerry <bzg@gnu.org>
 ;; Keywords: outlines, hypermedia, calendar, wp
 ;; Homepage: https://orgmode.org
 ;; Version: 9.3.2