removeChildCategory(Launcher.SYSTEM_CATEGORY);
removeCategory(Launcher.SYSTEM_CATEGORY);
    public void deconfigure() throws Exception {        Configuration c = (Configuration) getChildItem(Component.CONFIGURATION);        if (c != null) {            c.setChildItem(Launcher.SCREEN_CATEGORY, getChildCategory(Launcher.SCREEN_CATEGORY));            removeChildCategory(Launcher.SCREEN_CATEGORY);            removeChildCategory(Launcher.SYSTEM_CATEGORY);        } else {            throw new Exception("Could not deconfigure component. The configuration is null.");        }        super.deconfigure();    }