Query to remove past events

// search filter
function fb_search_filter($query) {
if ( !$query->is_admin && $query->is_search) {
$query->set('post_type', array('post', 'page', 'tribe_events', 'tribe_organizer') ); // id of page or post
/*
                                $today = date("Y-m-d");
                                $meta_query = array(
                                                array(
                                                                'key' => '_EventStartDate',
                                                                'value' => $today,
                                                                'compare' => '>'
                                                )
                                );
                                $query->set( 'meta_query', $meta_query );
*/
}

                return $query;
}

//The code above displays blog posts, pages, all events, and organizers.
//If I uncomment the other code, it displays upcoming events, but not blog posts, pages or organizers.