fix: xAI usage

relay/channel/xai/adaptor.go

@@ -48,7 +48,6 @@ func (a *Adaptor) ConvertOpenAIRequest(c *gin.Context, info *relaycommon.RelayIn
 	if request == nil {
 		return nil, errors.New("request is nil")
 	}
-	request.StreamOptions = nil
 	if strings.HasPrefix(request.Model, "grok-3-mini") {
 		if request.MaxCompletionTokens == 0 && request.MaxTokens != 0 {
 			request.MaxCompletionTokens = request.MaxTokens