Make Makefile browser obsolete

Make Makefile browser obsolete

* lisp/progmodes/make-mode.el:
(makefile-mode): Don't document Makefile browser mode.
(makefile-browser-toggle-state-for-line):
(makefile-browser-buffer-name, makefile-browser-leftmost-column)
(makefile-browser-cursor-column, makefile-browser-selected-mark)
(makefile-browser-unselected-mark)
(makefile-browser-auto-advance-after-selection-p)
(makefile-browser-hook, makefile-browser-map)
(makefile-browser-client, makefile-browser-selection-vector)
(makefile-browser-format-target-line)
(makefile-browser-format-macro-line, makefile-browser-fill)
(makefile-browser-next-line, makefile-browser-previous-line)
(makefile-browser-quit, makefile-browser-toggle)
(makefile-browser-insert-continuation)
(makefile-browser-insert-selection)
(makefile-browser-insert-selection-and-quit)
(makefile-browser-send-this-line-item)
(makefile-browser-start-interaction, makefile-browse)
(makefile-switch-to-browser, makefile-browser-on-macro-line-p)
(makefile-browser-this-line-target-name)
(makefile-browser-this-line-macro-name)
(makefile-browser-get-state-for-line)
(makefile-browser-set-state-for-line)
(makefile-browser-toggle-state-for-line): Make obsolete.  (Bug#58848)
(makefile-mode-menu): Remove Makefile browser from menu.
* etc/NEWS: Announce its obsoletion.