Emacs: Remove duplicates from file-name-handler-alist

.emacs.d/init.el

@@ -19,7 +19,8 @@
 (defun ambrevar/reset-file-name-handler-alist ()
   (setq file-name-handler-alist
         (append default-file-name-handler-alist
-                file-name-handler-alist)))
+                file-name-handler-alist))
+  (cl-delete-duplicates file-name-handler-alist :test 'equal))
 (add-hook 'after-init-hook 'ambrevar/reset-file-name-handler-alist)
 
 ;;; Avoid the "loaded old bytecode instead of newer source" pitfall.