Emacs: Split ediff window horizontally

.emacs.d/init.el

@@ -57,7 +57,6 @@ To view where the bindings are set in your config files, lookup
 
 ;; Minor modes
 (add-hook 'dired-mode-hook  (lambda () (require 'mode-dired)))
-(add-hook 'ediff-mode-hook  (lambda () (require 'mode-ediff)))
 (add-hook 'eshell-load-hook (lambda () (require 'mode-eshell)))
 (add-hook 'gud-mode-hook    (lambda () (require 'mode-gud)))
 (add-hook 'octave-mode-hook (lambda () (require 'mode-octave)))

.emacs.d/lisp/main.el

@@ -360,6 +360,9 @@
 ;; Replace `kill-buffer' binding by `kill-this-buffer'.
 (define-key mickey-minor-mode-map (kbd "C-x k") 'kill-this-buffer)
 
+(setq ediff-window-setup-function 'ediff-setup-windows-plain
+      ediff-split-window-function 'split-window-horizontally)
+
 (provide 'main)
 
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.emacs.d/lisp/mode-ediff.el

@@ -1,13 +0,0 @@
-;; Ediff
-
-;; In one frame.
-(setq ediff-window-setup-function 'ediff-setup-windows-plain)
-
-;; Ediff split horizontally by default. ediff split does not seem to
-;; work. Looks like the variable is never used in the source file.
-(add-hook
- 'ediff-mode-hook
- (lambda ()
-   (setq ediff-merge-split-window-function 'split-window-vertically)))
-
-(provide 'mode-ediff)