新增支付宝免输插件，修复一些小问题

config/extend/payplugin.php

@@ -40,16 +40,4 @@ return array (
     'version' => '1.0',
     'state' => 1,
   ),
-  3 => 
-  array (
-    'platform' => 'alipayb',
-    'name' => '支付宝账单',
-    'class_name' => 'AliPayb',
-    'price' => NULL,
-    'describe' => '支付宝账单查询回调，免挂机，稳定不掉线',
-    'website' => 'https://open.alipay.com',
-    'helplink' => 'https://f0bmwzqjtq2.feishu.cn/docx/HBVrdrsACo36bzxUCSPcjOBNnyb',
-    'version' => '1.0',
-    'state' => 1,
-  ),
 );