diff --git a/configuration.org b/configuration.org
index 83323da..9d24c38 100644
--- a/configuration.org
+++ b/configuration.org
@@ -280,16 +280,6 @@ Taken from [[http://ergoemacs.org/emacs/emacs_set_backup_into_a_directory.html][
       backup-file-path))
 #+END_SRC
 
-*** Run a function on a region
-
-#+BEGIN_SRC emacs-lisp
-(defun func-region (start end func)
-  "Run a function over the region between START and END in current buffer."
-  (save-excursion
-    (let ((text (delete-and-extract-region start end)))
-      (insert (funcall func text)))))
-#+END_SRC
-
 *** Find the first number on line
 
 #+begin_src emacs-lisp