Tampermonkey Userscript to hide codeforces rankings

gistfile1.txt

// ==UserScript==
// @name         CF no ranks
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        http://codeforces.com/
// @grant        none
// ==/UserScript==

// hides all elements occurunces of the given class name from the page
function hideAllElementsOf(selector) {
   var elements = document.querySelectorAll(selector);
   for (var i=0; i<elements.length; i++) {
       elements[i].style.display = "none";
   }
}

(function() {
    'use strict';

    // hide ratings in profile page
    hideAllElementsOf('.info ul li:first-child'); // rating on profile page
    hideAllElementsOf('#placeholder'); // graph
    hideAllElementsOf('.user-rank');

    // all pages (sidebar
    hideAllElementsOf('.personal-sidebar ul li:first-child');
    hideAllElementsOf('.sidebar .avatar div');

    // remove all classes for rated users
    var userLinks = document.querySelectorAll('.rated-user');
    for (var i=0; i<userLinks.length; i++) {
        userLinks[i].classList.remove('user-red');
        userLinks[i].classList.remove('user-violet');
        userLinks[i].classList.remove('user-orange');
        userLinks[i].classList.remove('user-blue');
        userLinks[i].classList.remove('user-gray');
        if (userLinks[i].classList.contains('user-legendary')) {
            if (userLinks[i].querySelector('span'))
                userLinks[i].querySelector('span').classList.remove('legendary-user-first-letter');
            userLinks[i].classList.remove('user-legendary');
        }
        userLinks[i].classList.add('user-green');
    }

    // contests
    // >> rating change
    hideAllElementsOf('.user-contests-table tr th:nth-child(5)');
    hideAllElementsOf('.user-contests-table tr td:nth-child(5)');

    // >> new rating
    hideAllElementsOf('.user-contests-table tr th:nth-child(6)');
    hideAllElementsOf('.user-contests-table tr td:nth-child(6)');

    // >> updated rank
    hideAllElementsOf('.user-contests-table tr th:nth-child(7)');
    hideAllElementsOf('.user-contests-table tr td:nth-child(7)');

})();