Very old multiple records removing JQuery script, I do not need it anymore

gistfile1.txt

// import Routing from '../../vendor/friendsofsymfony/jsrouting-bundle/Resources/public/js/router.min.js';
// Routing.setRoutingData(routes);


//event triggers
$(document).on('change', '.check_all', checkAllRows);
$(document).on('click', '#delete_all', deleteSelected);


// checks all checkboxes to delete items
function checkAllRows() {
    if ($('.check_all:checked').length > 0) {
        $('.checker').each(function () {
            $($(this)).prop('checked', true);
        });
    } else {
        $('.checker').each(function () {
            $($(this)).prop('checked', false);
        });
    }
}

/**
 * delete selected rows in table
 */
function deleteSelected() {
    let confirmDelete = confirm('Are you sure?');
    if (!confirmDelete) {
        return;
    }
    $('.checker').each(function () {
        let checkedRow = $(this);
        if (checkedRow.is(':checked')) {
            let deleteRoute = checkedRow.val();
            $.ajax({
                url: deleteRoute,
                beforeSend: function (xhr) {
                    xhr.setRequestHeader('X-CSRF-Token', $('meta[name="csrf-token"]').attr('content'))
                },
                type: 'POST',
                data: {
                    "_method": 'DELETE',
                },
                success: function () {
                    checkedRow.closest("tr").remove();
                },
                error: function (response) {
                    console.log(response);
                }
            });

        }
    });
}