Emacs: Replace own unfill-paragraph and unfill-region with package 'unfill'.

.emacs.d/lisp/functions.el

@@ -190,6 +190,7 @@ If DIR-LEFT is t, then move left, otherwise move right."
 
 (defun ambrevar/reset-fill-column ()
   "Reset `fill-column' to its default value."
+  (interactive)
   (setq fill-column (default-value 'fill-column)))
 
 (defun ambrevar/sort-lines-unique (arg)
@@ -369,19 +370,6 @@ This does not interfere with `subword-mode'."
     (modify-syntax-entry ?_ "_")
     (message "_ is a word delimiter")))
 
-(defun ambrevar/unfill-paragraph ()
-  "Paragraph at point is unwrapped on one single line."
-  (interactive)
-  (let ((fill-column (point-max)))
-    (fill-paragraph nil)))
-
-(defun ambrevar/unfill-region ()
-  "Unfill all paragraphs found in current region.
-Each paragraph stand on its line."
-  (interactive)
-  (let ((fill-column (point-max)))
-    (fill-region (region-beginning) (region-end) nil)))
-
 (defun ambrevar/youtube-dl-url (&optional url)
   "Run 'youtube-dl' over the URL.
 If URL is nil, use URL at point."