/wp-admin/options.php
medium_large_size_w


function dco_remove_default_image_sizes( $sizes) {
	return array_diff( $sizes, array(
		'thumbnail',
		'medium',
		'medium_large',
		'large',
	) );
}
add_filter('intermediate_image_sizes', 'dco_remove_default_image_sizes');


add_action('after_setup_theme', function() {
	echo '<pre>';
	print_r(wp_get_additional_image_sizes());
	echo '</pre>';
	die();
}, 999);


function dco_remove_default_image_sizes( $sizes) {
	return array_diff( $sizes, array(
		'thumbnail',
		'medium',
		'medium_large',
		'large',
		 
	) );
}
add_filter('intermediate_image_sizes', 'dco_remove_default_image_sizes');