Delete empty "History" sections

* lisp/bs.el:
* lisp/calendar/timeclock.el:
* lisp/cedet/semantic/bovine/grammar.el:
* lisp/cedet/semantic/grammar.el:
* lisp/cedet/semantic/wisent.el:
* lisp/cedet/semantic/wisent/comp.el:
* lisp/cedet/semantic/wisent/java-tags.el:
* lisp/cedet/semantic/wisent/wisent.el:
* lisp/erc/erc.el:
* lisp/net/newst-treeview.el:
* lisp/recentf.el:
* lisp/ruler-mode.el:
* lisp/textmodes/remember.el:
* lisp/thumbs.el:
* lisp/tree-widget.el:
* lisp/vc/vc-hg.el: Delete empty "History" sections.

* lisp/cedet/semantic/grammar.el
(semantic-grammar-header-template): Don't add "History" section to
generated file.

lisp/cedet/semantic/bovine/grammar.el

@@ -25,9 +25,8 @@
 ;;
 ;; Major mode for editing Bovine's input grammar (.by) files.
 
-;;; History:
-
 ;;; Code:
+
 (require 'semantic)
 (require 'semantic/grammar)
 (require 'semantic/find)

lisp/cedet/semantic/grammar.el

@@ -23,9 +23,6 @@
 ;;
 ;; Major mode framework for editing Semantic's input grammar files.
 
-;;; History:
-;;
-
 ;;; Code:
 
 (require 'semantic)
@@ -600,9 +597,6 @@ Typically a DEFINE expression should look like this:
 ;; PLEASE DO NOT MANUALLY EDIT THIS FILE!  It is automatically
 ;; generated from the grammar file " gram ".
 
-;;; History:
-;;
-
 ;;; Code:
 
 (require 'semantic/lex)

lisp/cedet/semantic/wisent.el

@@ -22,13 +22,10 @@
 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
 
 ;;; Commentary:
-;;
+
 ;; Here are functions necessary to use the Wisent LALR parser from
 ;; Semantic environment.
 
-;;; History:
-;;
-
 ;;; Code:
 
 (require 'semantic)

lisp/cedet/semantic/wisent/comp.el

@@ -35,9 +35,6 @@
 ;;
 ;; For more details on Wisent itself read the Wisent manual.
 
-;;; History:
-;;
-
 ;;; Code:
 (require 'semantic/wisent)
 (eval-when-compile (require 'cl-lib))

lisp/cedet/semantic/wisent/java-tags.el

@@ -24,9 +24,6 @@
 ;;; Commentary:
 ;;
 
-;;; History:
-;;
-
 ;;; Code:
 
 (require 'semantic/wisent)

lisp/cedet/semantic/wisent/wisent.el

@@ -34,9 +34,6 @@
 ;;
 ;; For more details on Wisent itself read the Wisent manual.
 
-;;; History:
-;;
-
 ;;; Code:
 
 (defgroup wisent nil