$('div.products-title').hide();The "div.products-title" is the selector, simply what we want to change. And the ".hide()" adds a "display: none" css code to that object. So it can be easily replaced with a css rule like this:
div.products-title { display: none;}You should replace those scripts if you find that they work slowly or not at all. Or if some other script used on your site stops working after adding those.