Use `unfill' package and delete `kill-ring-save-unfilled'

`acdw/copy-region-plain' takes care of what I want it to.

init.el

@@ -1466,6 +1466,8 @@ if ripgrep is installed, otherwise `consult-grep'."
   
   (global-undo-fu-session-mode +1))
 
+(setup (:straight unfill))
+
 (setup (:straight (unfocused
                    :host github
                    :repo "duckwork/unfocused"))

lisp/acdw.el

@@ -87,21 +87,6 @@ ARG).  When called with multiple arguments or a list, it returns
       (save-restriction
         (unfill-region (point-min) (point-max))))))
 
-(defun kill-ring-save-unfilled (start end &optional region)
-  "Unfill, kill, then re-fill the region defined by START and END positions.
-REGION is passed straight to `kill-ring-save'."
-  (interactive "*r")
-  (let ((sentence-end-double-space nil))
-    (unfill-region start end)
-    (kill-ring-save
-     ;; A quick hack to try and ameliorate the "Args out of range" error when
-     ;; `unfill-region' removes some newlines.  I'm not sure if this will work
-     ;; if calling from Lisp or other such nonsense.
-     (max start (point-min))
-     (min end (point-max))
-     region))
-  (fill-region start end))
-
 (defmacro when-unfocused (name &rest forms)
   "Define a function NAME, executing FORMS, that fires when Emacs
 is unfocused."