Getting rid of the ‘Blogroll’ text

I’m trying to get rid of the ‘Blogroll’ text and I this is what I read in the template tags sections:

title_li
(string) Text for the heading of the Page list. Defaults to ‘__(‘Bookmarks’)’, which displays “Bookmarks” (the __(”) is used for localization purposes). Only used with categorize set to 0 (else the category names will be used instead). If passed a null or empty value (”), no heading is displayed, and the list will not be wrapped with

,

tags.

But if I have it like <?php wp_list_bookmarks('title_li=0'); ?> or <?php wp_list_bookmarks(''); ?> the ‘Blogroll’ text is dipslayed anyway. Is there a way to get rid of that?
Thanks!