Remove duplicate-thing package

custom/setup-editing.el

@@ -44,7 +44,7 @@
                                           newline-mark))
                             (whitespace-mode 1)))
 
-;; Package: volatile-highlights
+;; Package: volatile-highlights --- show changes by "undo/yanks/..."
 ;; GROUP: Editing -> Volatile Highlights
 (require 'volatile-highlights)
 (volatile-highlights-mode t)
@@ -137,10 +137,6 @@
 (require 'iedit)
 (global-set-key (kbd "C-;") 'iedit-mode)
 
-;; PACKAGE: duplicate-thing
-(require 'duplicate-thing)
-(global-set-key (kbd "M-c") 'duplicate-thing)
-
 ;; Customized functions
 (defun prelude-move-beginning-of-line (arg)
   "Move point back to indentation of beginning of line.

init.el

@@ -23,7 +23,6 @@
 (defconst my-packages
   '(anzu
     company
-    duplicate-thing
     ggtags
     helm
     helm-gtags