Agiledashboard depends on tracker and cardwall. Cardwall depends depends on tracker.

This means that I can uninstall agiledashboard and keep cardwall plugins.

However in cardwallPlugin there is a dependency on agiledashboard:

public function tracker_event_export_full_xml($params)
{
    $plannings = PlanningFactory::build()->getOrderedPlanningsWithBacklogTracker($params['user'], $params['group_id']);
    $this->getAgileDashboardExplorer()->export($params['xml_content'], $plannings);

    $this->getCardwallXmlExporter($params['group_id'])->export($params['xml_content']);
}

private function getAgileDashboardExplorer()
{
    return new AgileDashboard_XMLExporter(new XML_RNGValidator(), new PlanningPermissionsManager());
}