remove outdated 'response' field

chatSession.go

@@ -164,8 +164,8 @@ func (ss *openIDSessionData) incomingMsg(v InWechatMsg) {
 		log.Printf("current procedure after command = %s", ss.Procedure)
 		if !processed { // transfer to Customer Service (kf)
 			//start transfer
-			ss.state.response, _ = BuildKFTransferAnyOneMsg(openID)
-			v.replyXML(ss.state.response)
+			xml, _ := BuildKFTransferAnyOneMsg(openID)
+			v.replyXML(xml)
 			kfSendTxt(openID, "已转接校友会理事会，稍后答复您")
 		}
 	}

chatState.go

@@ -24,7 +24,7 @@ type chatState struct {
 	Data map[string]string `json:"Data"` //the state save some data for later usage
 
 	//runtime memory only
-	response string //被动回复消息的内容
+	//response string //被动回复消息的内容
 }
 
 func createEmptyState(openID, procedure string, expireInSeconds int32) chatState {