//删除仪表盘模块
function example_remove_dashboard_widgets() {
    // Globalize the metaboxes array, this holds all the widgets for wp-admin
    global $wp_meta_boxes;
    // 以下这一行代码将删除 "快速发布" 模块
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);
    // 以下这一行代码将删除 "引入链接" 模块
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);
    // 以下这一行代码将删除 "插件" 模块
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
    // 以下这一行代码将删除 "近期评论" 模块
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']);
    // 以下这一行代码将删除 "近期草稿" 模块
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_recent_drafts']);
    // 以下这一行代码将删除 "WordPress 开发日志" 模块
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);
    // 以下这一行代码将删除 "其它 WordPress 新闻" 模块
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);
    // 以下这一行代码将删除 "概况" 模块
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);
}
add_action('wp_dashboard_setup', 'example_remove_dashboard_widgets' );

将以上代码放入主题的function.php中即可。