update packages

lisp/org-ref/org-ref-isbn.el

@@ -1,6 +1,6 @@
 ;;; org-ref-isbn.el --- utilities for generating bibtex entries from an ISBN  -*- lexical-binding: t; -*-
 
-;; Copyright (C) 2015  John Kitchin
+;; Copyright (C) 2015-2024  John Kitchin
 
 ;; Author: John Kitchin <jkitchin@andrew.cmu.edu>
 ;; Keywords: convenience
@@ -25,7 +25,7 @@
 ;;; Code:
 (require 'f)
 (require 'org)
-(require 'org-ref-core)
+
 
 (defvar url-http-end-of-headers)