Remove Widgets

function remove_dashboard_widgets() {
    global $wp_meta_boxes;

    print_r($wp_meta_boxes['dashboard']);
    // Find the widget you want to remove and unset() it
}

function your_admin_init() {
    add_action('wp_dashboard_setup', 'remove_dashboard_widgets' );
}
add_action("admin_init", "your_admin_init");