Remove gpolonkai/enclose-region

I never really used this command.

configuration.org

@@ -416,44 +416,6 @@ Copied from http://whattheemacsd.com/editing-defuns.el-01.html
   (indent-for-tab-command))
 #+END_SRC
 
-*** Enclose region in a specific character
-
-#+BEGIN_SRC emacs-lisp
-(defun gpolonkai/enclose-region (character &optional start end)
-  "Enclose region between CHARACTER.
-
-If region is empty and neither START nor END is set, simply inserts CHARACTER
-two times and moves point between them.
-
-If character is present in `insert-pair-alist', this function will enclose
-region in the corresponding pair.  In this case, CHARACTER must be the opening
-member of the pair."
-
-  (interactive "cWhat character? \nr")
-
-  (let ((open character)
-        (close character)
-        (pair (assq character insert-pair-alist)))
-    (if pair
-        (if (nth 2 pair)
-            (setq open (nth 1 pair) close (nth 2 pair))
-          (setq open (nth 0 pair) close (nth 1 pair))))
-    (unless (and open close)
-      (setq open character
-            close character))
-    (unless (use-region-p)
-      (setq start (point)
-            end (point)))
-    (save-excursion
-      (goto-char end)
-      (insert-char close)
-
-      (goto-char start)
-      (insert-char open))
-    (unless (use-region-p)
-      (forward-char))))
-#+END_SRC
-
 *** Convert ~camelCase~ to ~snake_case~
 
 #+BEGIN_SRC emacs-lisp
@@ -3917,7 +3879,6 @@ directory.  It is available from [[http://plantuml.com/download][here]].
 #+BEGIN_SRC emacs-lisp
 (bind-keys
  :map global-map
- ("M-(" . gpolonkai/enclose-region)
  ("<C-return>" . open-line-below)
  ("<C-S-return>" . open-line-above)
  ("M-t" . nil) ;; Remove the old keybinding