Zend certified PHP/Magento developer

Magento 2 JS Checkout unused parameters

The question is about this file vendor/magento/module-checkout/view/frontend/web/js/action/set-payment-information.js

define([
    'Magento_Checkout/js/model/quote',
    'Magento_Checkout/js/model/url-builder',
    'mage/storage',
    'Magento_Checkout/js/model/error-processor',
    'Magento_Customer/js/model/customer',
    'Magento_Checkout/js/action/get-totals',
    'Magento_Checkout/js/model/full-screen-loader'
], function (quote, urlBuilder, storage, errorProcessor, customer, getTotalsAction, fullScreenLoader) {
})

getTotalsAction is not used here and there, but is included.

Can anybody explain how and why?