Steam remove trash licenses

(function () {
    var NUKE_REGEX = /\b(?:trailer|teaser|demo|cinematic|pegi|esrb)\b/i;

    var PACKAGE_ID_REGEX = /javascript:\s*RemoveFreeLicense\s*\(\s*(\d+)/;
    var REMOVE_LICENSE_API = "/account/removelicense";
    var RUN_ON_PAGE = "https://store.steampowered.com/account/";

    if (location.href !== RUN_ON_PAGE) {
        if (confirm("You're not on your licenses page, dummy. Go there now?")) {
            location.assign(RUN_ON_PAGE);
        }
        return;
    }

    var idsToRemove = [];

    var rows;
    var licensesTable = document.getElementById("licenses");
    var packageId;

    if (licensesTable && window.g_sessionID) {
        licensesTable = licensesTable.getElementsByClassName("account_table")[0];
        rows = licensesTable.rows;

        for (var i = 0, l = rows.length; i < l; i++) {
            if (NUKE_REGEX.test(rows[i].cells[0].textContent)) {
                packageId = PACKAGE_ID_REGEX.exec(rows[i].cells[1].innerHTML);

                if (packageId !== null) {
                    idsToRemove.push(packageId[1]);
                }
            }
        }

        function removePackageAndQueueNext(packages, index) {
            if (index >= packages.length) {
                console.log("Packages removed.");
                return; // done
            }

            var parameters = "?sessionid=" + encodeURIComponent(g_sessionID) + "&packageid=" + encodeURIComponent(packages[index]);

            var xhr = new XMLHttpRequest();
            xhr.open("HEAD", REMOVE_LICENSE_API + parameters, true);
            xhr.onreadystatechange = function () {
                if (this.readyState === 4) {
                    console.log("Removed package %d/%d", index + 1, packages.length);
                    removePackageAndQueueNext(packages, index + 1);
                }
            };
            xhr.send();
        }

        // Kick off the first request
        if (idsToRemove.length > 0) {
            removePackageAndQueueNext(idsToRemove, 0);
        }
    }
})();