no test, but will work
PHP Code:
kickSpectators()
{
    
players getEntArray("player""classname");
    for (
0players.sizei++)
    {
        
player players[i];
        if (!
isDefined(player.pers) || !isDefined(player.pers["team"]) || player.pers["team"] != "spectator")
            continue;
        
        
kick(player getEntityNumber());
    }