:bug: 去掉重复参数

src/util/API/AJAXHelper.js

@@ -62,7 +62,6 @@ class AJAXHelper {
 		xmlHttpReq.setRequestHeader('uid', uid);
 		xmlHttpReq.setRequestHeader('sign', sign);
 		xmlHttpReq.setRequestHeader('terminal', platform);
-		xmlHttpReq.setRequestHeader('merchant', 'baby');
 		xmlHttpReq.setRequestHeader('requestId', requestId);
 		xmlHttpReq.setRequestHeader('merchant', 'baby');
 		xmlHttpReq.setRequestHeader('Authentication', sign); //header中增加Authentication以兼容老版本