Remove some unnecessary references to Emacs 22

* lisp/cedet/semantic/fw.el:
* lisp/emacs-lisp/bytecomp.el (byte-compile-from-buffer):
* lisp/emulation/viper-util.el (viper-frame-value):
* lisp/mail/rmail.el (rmail-delete-headers):
* lisp/mh-e/mh-e.el (mh-inc-spool-list): Remove some unnecessary
references to Emacs 22.

lisp/cedet/semantic/fw.el

@@ -66,8 +66,6 @@
 
 (defalias 'semantic-mode-line-update #'force-mode-line-update)
 
-;; Since Emacs 22 major mode functions should use `run-mode-hooks' to
-;; run major mode hooks.
 (define-obsolete-function-alias 'semantic-run-mode-hooks #'run-mode-hooks "28.1")
 
 ;; Fancy compat usage now handled in cedet-compat

lisp/emacs-lisp/bytecomp.el

@@ -2230,8 +2230,7 @@ With argument ARG, insert value in current buffer after the form."
 	(byte-compile-depth 0)
 	(byte-compile-maxdepth 0)
 	(byte-compile-output nil)
-	;; This allows us to get the positions of symbols read; it's
-	;; new in Emacs 22.1.
+        ;; This allows us to get the positions of symbols read.
 	(read-with-symbol-positions inbuffer)
 	(read-symbol-positions-list nil)
 	;;	  #### This is bound in b-c-close-variables.

lisp/emulation/viper-util.el

@@ -79,9 +79,6 @@
 (defmacro viper-frame-value (variable)
   "Return the value of VARIABLE local to the current frame, if there is one.
 Otherwise return the normal value."
-  ;; Frame-local variables are obsolete from Emacs 22.2 onwards,
-  ;; so we do it by hand instead.
-  ;; Buffer-local values take precedence over frame-local ones.
   `(if (local-variable-p ',variable)
        ,variable
      ;; Distinguish between no frame parameter and a frame parameter

lisp/mail/rmail.el

@@ -4125,10 +4125,8 @@ typically for purposes of moderating a list."
   "A regexp that matches the separator before the text of a failed message.")
 
 (defvar mail-mime-unsent-header "^Content-Type: message/rfc822 *$"
- "A regexp that matches the header of a MIME body part with a failed message.")
+  "A regexp that matches the header of a MIME body part with a failed message.")
 
-;; This is a cut-down version of rmail-clear-headers from Emacs 22.
-;; It doesn't have the same functionality, hence the name change.
 (defun rmail-delete-headers (regexp)
   "Delete any mail headers matching REGEXP.
 The message should be narrowed to just the headers."
@@ -4136,10 +4134,6 @@ The message should be narrowed to just the headers."
     (goto-char (point-min))
     (while (re-search-forward regexp nil t)
       (beginning-of-line)
-      ;; This code from Emacs 22 doesn't seem right, since r-n-h is
-      ;; just for display.
-;;;      (if (looking-at rmail-nonignored-headers)
-;;;	  (forward-line 1)
       (delete-region (point)
 		     (save-excursion
 		       (if (re-search-forward "\n[^ \t]" nil t)

lisp/mh-e/mh-e.el

@@ -1607,7 +1607,7 @@ on the \"INS\" button. Enter a \"Spool File\" of \"~/mail/mh-e\", a
 \"Folder\" of \"mh-e\", and a \"Key Binding\" of \"m\".
 
 You can use \"xbuffy\" to automate the incorporation of this mail
-using the Emacs 22 command \"emacsclient\" as follows:
+using \"emacsclient\" as follows:
 
     box ~/mail/mh-e
         title mh-e