tag list in tag archive - remove active tag

add_filter('the_tags','the_tags_in_tag_archive');
/*filter to replicate 'the_tags()' in a tag archive, to remove the current tag from the list
* alchymyth 2011
*/
function the_tags_in_tag_archive($list) {
if( is_tag() ) : //do the following only in tag archives
global $post;
$this_tag = get_query_var('tag');
//retrieve the $before,$sep,$after variables from the list
$before = explode('<a href', $list);
$before = $before[0];
$afters = explode('</a>', $list);
$after = array_pop($afters);
$separator = explode('<a href', $afters[1]);
$separator = $separator[0];
$list = ''; $sep = '';
//get the post tags
$posttags = get_the_tags($post->ID);
    if($posttags) :
    //build new tag list
        foreach( $posttags as $tag ) {
            if( $tag->slug != $this_tag ) {
            $list .= $sep . '<a href="' . get_tag_link( $tag->term_id) . '">' . $tag->name . '</a>';
            $sep = $separator;
            }
        if( !$list ) $list = ' - ';
        }
    $list = $before . $list . $after;
    endif;
endif; //end of is_tag()
return $list;
}