Removes link to comment author websites

functions.php

/*
 * Remove Comments Author's link
 *
 */
function remove_commentauthorlink( $return, $author, $comment_ID ) {
    return $author;
}
add_filter( 'get_comment_author_link', 'remove_commentauthorlink', 10, 3 );

function remove_commentauthorurl() {
    return false;
}
add_filter( 'get_comment_author_url', 'remove_commentauthorurl');