Make url-dired.el obsolete (part 2/2)

* lisp/obsolete/url-dired.el: Add "Obsolete-since" header.
(url-dired-minor-mode-map): Minor fix.
* lisp/url/url-file.el (url-dired): Don't require.
* etc/NEWS: Announce its obsoletion.

etc/NEWS

@@ -349,6 +349,9 @@ Use 'abbrev', 'skeleton' or 'tempo' instead.
 ** The rlogin.el library, and the 'rsh' command are now obsolete.
 Use something like 'M-x shell RET ssh <host> RET' instead.
 
+---
+** The url-dired.el library is now obsolete.
+
 ---
 ** The fast-lock.el and lazy-lock.el library have been removed.
 They have been obsolete since Emacs 22.1.

lisp/obsolete/url-dired.el

@@ -3,6 +3,7 @@
 ;; Copyright (C) 1996-1999, 2004-2022 Free Software Foundation, Inc.
 
 ;; Keywords: comm, files
+;; Obsolete-since: 29.1
 
 ;; This file is part of GNU Emacs.
 
@@ -27,7 +28,7 @@
 
 (defvar-keymap url-dired-minor-mode-map
   :doc "Keymap used when browsing directories."
-  "C-m"       #'url-dired-find-file
+  "RET"       #'url-dired-find-file
   "<mouse-2>" #'url-dired-find-file-mouse)
 
 (defun url-dired-find-file ()

lisp/url/url-file.el

@@ -26,7 +26,6 @@
 (require 'mailcap)
 (require 'url-vars)
 (require 'url-parse)
-(require 'url-dired)
 (declare-function mm-disable-multibyte "mm-util" ())
 
 (defvar url-allow-non-local-files nil