Don't call the same hook twice due to obsolete aliases

* lisp/international/robin.el (robin-activate):
* lisp/international/quail.el (quail-activate):
* lisp/international/mule-cmds.el (deactivate-input-method):
* lisp/emulation/viper-init.el (viper-deactivate-input-method):
Don't call the same hook twice, when the obsolete and the
advertised symbols are aliased.  (Bug#28118)

lisp/emulation/viper-init.el

@@ -344,9 +344,7 @@ Use `\\[viper-set-expert-level]' to change this.")
 	     (quail-delete-overlays))
 	 (setq describe-current-input-method-function nil)
 	 (setq current-input-method nil)
-	 (run-hooks
-	  'input-method-inactivate-hook ; for backward compatibility
-	  'input-method-deactivate-hook)
+	 (run-hooks 'input-method-deactivate-hook)
 	 (force-mode-line-update))
 	))
 (defun viper-activate-input-method ()

lisp/international/mule-cmds.el

@@ -1482,9 +1482,7 @@ If INPUT-METHOD is nil, deactivate any current input method."
 		current-input-method-title nil)
 	  (funcall deactivate-current-input-method-function))
       (unwind-protect
-	  (run-hooks
-	   'input-method-inactivate-hook ; for backward compatibility
-	   'input-method-deactivate-hook)
+	  (run-hooks 'input-method-deactivate-hook)
 	(setq current-input-method nil)
 	(force-mode-line-update)))))
 

lisp/international/quail.el

@@ -569,9 +569,7 @@ While this input method is active, the variable
 	    (setq describe-current-input-method-function nil)
 	    (quail-hide-guidance)
 	    (remove-hook 'post-command-hook 'quail-show-guidance t)
-	    (run-hooks
-	     'quail-inactivate-hook ; for backward compatibility
-	     'quail-deactivate-hook))
+	    (run-hooks 'quail-deactivate-hook))
 	(kill-local-variable 'input-method-function))
     ;; Let's activate Quail input method.
     (if (null quail-current-package)

lisp/international/robin.el

@@ -413,9 +413,7 @@ While this input method is active, the variable
 	  (progn
 	    (setq robin-mode nil)
 	    (setq describe-current-input-method-function nil)
-	    (run-hooks
-	     'robin-inactivate-hook ; for backward compatibility
-	     'robin-deactivate-hook))
+	    (run-hooks 'robin-deactivate-hook))
 	(kill-local-variable 'input-method-function))
 
     ;; activate robin input method.