diff -r 12cf67bc486c -r ab9ebd922ccb elisp/stack-mode/fifo.el
--- a/elisp/stack-mode/fifo.el	Fri Sep 18 17:39:07 2015 -0500
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,55 +0,0 @@
-;;; fifo.el --- FIFO queue.
-
-;; Copyright (c) 2015 Chris Done.
-
-;; This file is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 3, or (at your option)
-;; any later version.
-
-;; This file is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-;;; Code:
-
-(require 'cl-lib)
-
-(defun fifo-make ()
-  "Make a fifo queue."
-  (cons 0 nil))
-
-(defun fifo-push (q a)
-  "Push a new item onto the queue."
-  (cl-assert (consp q) nil "Must be a queue.")
-  (setcar q (1+ (car q)))
-  (let ((next q)
-        (continue t))
-    (while (not (null (cdr next)))
-      (setq next (cdr next)))
-    (setcdr next (cons a nil)))
-  q)
-
-(defun fifo-pop (q)
-  "Pop the next item on the queue."
-  (cl-assert (consp q) nil "Must be a queue.")
-  (cl-assert (consp (cdr q)) nil "No items to pop from queue.")
-  (setcar q (1- (car q)))
-  (let ((a (car (cdr q))))
-    (setcdr q (cdr (cdr q)))
-    a))
-
-(defun fifo-size (q)
-  "Get the size of the queue."
-  (cl-assert (consp q) nil "Must be a queue.")
-  (car q))
-
-(defun fifo-null-p (q)
-  "Is the queue empty?"
-  (= (fifo-size q) 0))
-
-(provide 'fifo)