Remove paywall from helsingin sanomat / hs.fi

hs_fi_paywall.user.js

// ==UserScript==
// @name        hs.fi paywall resetter
// @namespace   maksumuuri
// @include     http://www.hs.fi/*
// @version     1
// @grant       none
// ==/UserScript==

/**
 * Helsinginsanomat Paywall resetting
 * They override localStorage.removeItem to prevent removing items from localStorage.
 * This breakpoint function even seems to contain home calling function to report overtly
 * smart people.
 * And then they save localstorage items on initial load to anonymous function, and use
 * every second running timer to restore localStorage contents from that anonymous function.
 */

// Poor design, remove their histore restore function
hs.paywall.instance.restore = function() { return false; }

// Remove their prototype function to restore native behaviour
delete window.localStorage.removeItem;

// Remove history from localStorage
window.localStorage.removeItem('_hs_hist')

says here

VM281:1 Uncaught ReferenceError: hs is not defined
    at <anonymous>:1:1

when i paste this bit of code to the Google Chrome console.