how to display only the shipping method that i have chosen to cart page

Hello woocommerce team,

My code:

add_filter(‘woocommerce_package_rates’, ‘hide_non_selected_shipping_methods’, 0);

function hide_non_selected_shipping_methods($rates) {
$shipping_method_1 =’free_shipping:4′; // δωρεαν μεταφορικα
$shipping_method_2 =’flat_rate:5′; // αποστολη σε διευθυνση
$shipping_method_3 =’flat_rate:6′; // στο σχολειο
$shipping_method_4 =’local_pickup:7′; // παραλαβη απ το καταστημα
global $woocommerce;
$chosen_methods = WC()->session->get( ‘chosen_shipping_methods’ );
$chosen_shipping = $chosen_methods[0];

if ($chosen_shipping == $shipping_method_2) {
echo ‘hello’;
//echo ‘<label for=”shipping_method_0_free_shipping4″ style=”display:none !important;”>’ ;
unset( $rates[$shipping_method_1] );
}
return $rates;
}

What is going wrong and i can’t unset shipping methods?

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