Delete redundant declarations of 'electric' variables

* lisp/progmodes/js.el (electric-layout-rules):
* lisp/progmodes/octave.el (electric-layout-rules):
* lisp/progmodes/python.el (electric-indent-inhibit):
* lisp/textmodes/rst.el (electric-indent-inhibit): Delete redundant
declarations; 'electric' is preloaded since Emacs 24.4.

lisp/progmodes/js.el

@@ -62,7 +62,6 @@
   (require 'rx))
 
 (defvar ido-cur-list)
-(defvar electric-layout-rules)
 (declare-function ido-mode "ido" (&optional arg))
 (declare-function treesit-parser-create "treesit.c")
 (declare-function treesit-induce-sparse-tree "treesit.c")

lisp/progmodes/octave.el

@@ -536,8 +536,6 @@ Non-nil means always go to the next Octave code line after sending."
       (put-text-property (match-beginning 1) (match-end 1)
                          'syntax-table (string-to-syntax "\"'")))))
 
-(defvar electric-layout-rules)
-
 ;; FIXME: cc-mode.el also adds an entry for .m files, mapping them to
 ;; objc-mode.  We here rely on the fact that loaddefs.el is filled in
 ;; alphabetical order, so cc-mode.el comes before octave-mode.el, which lets

lisp/progmodes/python.el

@@ -7050,7 +7050,6 @@ Add import for undefined name `%s' (empty to skip): "
              (eq (char-after) last-command-event))
     (save-excursion (insert (make-string 2 last-command-event)))))
 
-(defvar electric-indent-inhibit)
 (defvar prettify-symbols-alist)
 (defvar python--installed-grep-hook nil)
 

lisp/textmodes/rst.el

@@ -1323,8 +1323,6 @@ The hook for `text-mode' is run before this one."
 ;; Pull in variable definitions silencing byte-compiler.
 (require 'newcomment)
 
-(defvar electric-indent-inhibit)
-
 ;; Use rst-mode for *.rst and *.rest files.  Many ReStructured-Text files
 ;; use *.txt, but this is too generic to be set as a default.
 ;;;###autoload (add-to-list 'auto-mode-alist (purecopy '("\\.re?st\\'" . rst-mode)))