Declare empty macro imenu-progress-menu obsolete

* lisp/imenu.el: Remove commented out code.
(imenu-progress-message): Declare macro obsolete.

* lisp/erc/erc-imenu.el (erc-create-imenu-index):
* lisp/net/snmp-mode.el (snmp-mode-imenu-create-index):
* lisp/progmodes/antlr-mode.el (antlr-imenu-create-index-function):
Don't use or mention above obsolete macro.

lisp/erc/erc-imenu.el

@@ -73,13 +73,11 @@ Don't rely on this function, read it first!"
 	(topic-change-alist '())
 	prev-pos)
     (goto-char (point-max))
-    (imenu-progress-message prev-pos 0)
     (while (if (bolp)
 	       (> (forward-line -1)
 		  -1)
 	     (progn (forward-line 0)
 		    t))
-      (imenu-progress-message prev-pos nil t)
       (save-match-data
 	(when (looking-at (concat (regexp-quote erc-notice-prefix)
 				  "\\(.+\\)$"))

lisp/imenu.el

@@ -151,18 +151,6 @@ element should come before the second.  The arguments are cons cells;
   :type 'integer
   :group 'imenu)
 
-;; No longer used.  KFS 2004-10-27
-;; (defcustom imenu-scanning-message "Scanning buffer for index (%3d%%)"
-;;   "Progress message during the index scanning of the buffer.
-;; If non-nil, user gets a message during the scanning of the buffer.
-;;
-;; Relevant only if the mode-specific function that creates the buffer
-;; index use `imenu-progress-message', and not useful if that is fast, in
-;; which case you might as well set this to nil."
-;;   :type '(choice string
-;;  		 (const :tag "None" nil))
-;;   :group 'imenu)
-
 (defcustom imenu-space-replacement "."
   "The replacement string for spaces in index names.
 Used when presenting the index in a completion buffer to make the
@@ -280,26 +268,11 @@ The function in this variable is called when selecting a normal index-item.")
        (not (functionp (cadr item)))))
 
 (defmacro imenu-progress-message (_prevpos &optional _relpos _reverse)
-  "Macro to display a progress message.
-RELPOS is the relative position to display.
-If RELPOS is nil, then the relative position in the buffer
-is calculated.
-PREVPOS is the variable in which we store the last position displayed."
-
+  "This macro is obsolete and does nothing."
+  (declare (obsolete nil "28.1"))
 ;; Made obsolete/empty, as computers are now faster than the eye, and
 ;; it had problems updating the messages correctly, and could shadow
 ;; more important messages/prompts in the minibuffer.  KFS 2004-10-27.
-
-;;  `(and
-;;    imenu-scanning-message
-;;    (let ((pos ,(if relpos
-;;		   relpos
-;;		 `(imenu--relative-position ,reverse))))
-;;	(if ,(if relpos t
-;;	    `(> pos (+ 5 ,prevpos)))
-;;	 (progn
-;;	   (message imenu-scanning-message pos)
-;;	   (setq ,prevpos pos)))))
 )
 
 

lisp/net/snmp-mode.el

@@ -474,13 +474,11 @@ lines for the purposes of this function."
 	(index-table-alist '())
 	(index-trap-alist '())
         (case-fold-search nil) ; keywords must be uppercase
-	prev-pos token end)
+        token end)
     (goto-char (point-min))
-    (imenu-progress-message prev-pos 0)
     ;; Search for a useful MIB item (that's not in a comment)
     (save-match-data
       (while (re-search-forward snmp-clause-regexp nil t)
-        (imenu-progress-message prev-pos)
         (setq
          end (match-end 0)
          token (cons (match-string 1)
@@ -498,7 +496,6 @@ lines for the purposes of this function."
                (push token index-tc-alist)))
         (goto-char end)))
     ;; Create the menu
-    (imenu-progress-message prev-pos 100)
     (setq index-alist (nreverse index-alist))
     (and index-tc-alist
  	 (push (cons "Textual Conventions" (nreverse index-tc-alist))

lisp/progmodes/antlr-mode.el

@@ -1246,9 +1246,8 @@ IF TOKENREFS-ONLY is non-nil, just return alist with tokenref names."
   (let ((items nil)
 	(classes nil)
 	(continue t))
-    ;; Using `imenu-progress-message' would require imenu for compilation, but
-    ;; nobody is missing these messages.  The generic imenu function searches
-    ;; backward, which is slower and more likely not to work during editing.
+    ;; The generic imenu function searches backward, which is slower
+    ;; and more likely not to work during editing.
     (antlr-with-syntax-table antlr-action-syntax-table
       (antlr-invalidate-context-cache)
       (goto-char (point-min))