WordPress plugin to turn off auto creation of scaled images

disable-scaled-images.php

<?php
/**
 * Plugin Name:         Disable Scaled Images
 * Plugin URI:          https://www.nutt.net
 * Description:         One liner to turn off automatic scaled image creation for large images
 * Version:             0.1.0
 * Requires at least:   5.2
 * Requires PHP:        7.2
 * Author:              Ryan Nutt
 * Author URI:          https://www.nutt.net
 * License:             GPL v2 or later
 * License URI:         https://www.gnu.org/licenses/gpl-2.0.html
 * 
 * Really this could be added to your theme functions.php file, but I was working on a site that
 * was using a stock theme and I didn't want to go through the effort of creating a child theme
 * just for this one thing. Making a baby plugin seemed easier. 
 */

add_filter('big_image_size_threshold', '__return_false');