Cacher is the code snippet organizer for pro developers

<?php
/* ----------------------------------------------------------------------------
 * Remove default image sizes
 * ------------------------------------------------------------------------- */

//Remove default image sizes
add_action('init', 'remove_plugin_image_sizes');
function remove_plugin_image_sizes() {
	remove_image_size('shop_thumbnail');
	remove_image_size('shop_catalog');
	remove_image_size('shop_single');
	remove_image_size('woocommerce_thumbnail');
	remove_image_size('woocommerce_thumbnail_2x');
	remove_image_size('woocommerce_single');
}