问如何在Telegraf中注销中间件？

EN

const { Telegraf, Scenes, session } = require('telegraf')

const contactDataWizard = new Scenes.WizardScene(
    'CONTACT_DATA_WIZARD_SCENE_ID', // first argument is Scene_ID, same as for BaseScene
    (ctx) => {
        ctx.reply('Please enter guest\'s first name', Markup.removeKeyboard());
        ctx.wizard.state.contactData = {};
        return ctx.wizard.next();
    },
    (ctx) => {
        // validation example
        if (ctx.message.text.length < 2) {
            ctx.reply('Please enter real name');
            return;
        }
        ctx.wizard.state.contactData.firstName = ctx.message.text;
        ctx.reply('And last name...');
        return ctx.wizard.next();
    },
);

const stage = new Scenes.Stage();
stage.register(contactDataWizard);

bot.use(session());
bot.use(stage.middleware());