调优

@@ -12,15 +12,9 @@ use Model\listsSql;
 class AutoMail {
 
     public function __construct(){
-        $this->db = db();
         $this->start();
     }
 
-    /**
-     * @var \Lib\Db|\Lib\DbPool
-     */
-    private $db;
-
 
     /**
      * @author：dc