refactor: 修改产品属性特征模型

app/common/model/ProductAttrPropBaseModel.php

@@ -21,6 +21,5 @@ class ProductAttrPropBaseModel extends BaseModel
         'prop_name'  => 'string',
         'prop_value' => 'string',
         'created_at' => 'datetime',
-        'updated_at' => 'datetime',
     ];
 }