Fix remove purchase order error

[disanyixing]

SteamMarket.prototype.removeListing = function (item, callback /*err, data*/) {
        var sessionId = readCookie('sessionid');
            $.ajax({
                type: "POST",
                url: window.location.protocol + '//steamcommunity.com/market/removelisting/' + item,
                data: {
                    sessionid: sessionId
                },
                success: function (data) {
                    callback(ERROR_SUCCESS, data);
                },
                error: function () {
                    // return callback(ERROR_FAILED);
                    $.ajax({
                        type: "POST",
                        url: window.location.protocol + '//steamcommunity.com/market/cancelbuyorder/',
                        data: {
                            sessionid: sessionId,
                            buy_orderid: item
                        },
                        success: function (data) {
                            callback(ERROR_SUCCESS, data);
                        },
                        error: function () {
                            return callback(ERROR_FAILED);
                        },
                        crossDomain: true,
                        xhrFields: {
                            withCredentials: true
                        },
                        dataType: 'json'
                    });
                },
                crossDomain: true,
                xhrFields: {
                    withCredentials: true
                },
                dataType: 'json'
            });
    };

Before fix：

After fix：