优化结构

internal/integration/payment/wechat_v2.go

@@ -44,12 +44,6 @@ func wechatV2SignType(value string) string {
 	return gopayWechat.SignType_MD5
 }
 
-func wechatV2Sign(values map[string]string, key, signType string) string {
-	body := toGoPayBodyMap(values)
-	body.Remove("sign")
-	return gopayWechat.GetReleaseSign(key, wechatV2SignType(signType), body)
-}
-
 func (a *wechatV2Adapter) Create(ctx context.Context, req *bizpayment.PaymentRequest, c map[string]any) (*bizpayment.PaymentResult, error) {
 	if req == nil {
 		return nil, errors.New("微信支付 v2 下单请求为空")
@@ -581,12 +575,6 @@ func nonce() string {
 	}
 	return fmt.Sprintf("%d", time.Now().UnixNano())
 }
-func stringOr(extra map[string]any, key, fallback string) string {
-	if value, ok := extra[key].(string); ok {
-		return value
-	}
-	return fallback
-}
 func stringMap(values map[string]any) map[string]string {
 	result := map[string]string{}
 	for key, value := range values {