Remove small Gravtars from bbPress Forums

bbpress-avatar.php

<?php

/* Remove small Gravtars from bbPress Forums */
function rtp_remove_bbp_gravatar_null() {
    return null;
}

function rtp_remove_bbp_gravatar($author_link, $args) {
    return preg_replace('/<a.*<img.*>&nbsp;/iU', '', $author_link);
}

function rtp_remove_bbp_remove_link($author_link, $args) {
    return preg_replace('/<a.*><\/a>/iU', '', $author_link);
}

add_filter('bbp_get_author_link', 'rtp_remove_bbp_gravatar', '', 2);
add_filter('bbp_get_topic_author_display_name', 'rtp_remove_bbp_gravatar', '', 2);
add_filter('bbp_get_reply_author_link', 'rtp_remove_bbp_gravatar', '', 2);
add_filter('bbp_get_topic_author_avatar', 'rtp_remove_bbp_gravatar_null');
add_filter('bbp_get_topic_author_link', 'rtp_remove_bbp_remove_link', '', 2);