Remove some declare-function stub definitions

* lisp/emulation/viper-cmd.el, lisp/emulation/viper-keym.el:
* lisp/emulation/viper-util.el, lisp/net/newst-plainview.el:
* lisp/net/newst-treeview.el, lisp/ps-def.el, lisp/vc/ediff.el:
* lisp/vc/ediff-util.el, lisp/vc/ediff-wind.el:
Remove stub declare-function definitions.
It exists since Emacs 22.2, released 10 years ago.
Most of these files are using even newer features, such as
lexical-binding and cl-lib anyway, making the stubs pointless.

lisp/emulation/viper-cmd.el

@@ -45,8 +45,6 @@
 (defvar undo-beg-posn)
 (defvar undo-end-posn)
 
-(eval-and-compile
-  (unless (fboundp 'declare-function) (defmacro declare-function (&rest _))))
 ;; end pacifier
 
 

lisp/emulation/viper-keym.el

@@ -32,8 +32,6 @@
 (defvar viper-ex-style-editing)
 (defvar viper-ex-style-motion)
 
-(eval-and-compile
-  (unless (fboundp 'declare-function) (defmacro declare-function (&rest  r))))
 ;; end pacifier
 
 (require 'viper-util)

lisp/emulation/viper-util.el

@@ -42,9 +42,6 @@
 
 (require 'ring)
 
-(eval-and-compile
-  (unless (fboundp 'declare-function) (defmacro declare-function (&rest  r))))
-
 ;; end pacifier
 
 (require 'viper-init)