diff --git a/metric/metric.go b/metric/metric.go
index c8cc49b..be8c2bb 100644
--- a/metric/metric.go
+++ b/metric/metric.go
@@ -106,7 +106,6 @@ func (mc *metricCollection) metricWriter() {
 }
 
 var NewMetric func(MetricType, string, string, map[string]string) MetricWriter
-var ConcurrentUser = MetricWriterNil
 
 func init() {
 	NewMetric = func(MetricType, string, string, map[string]string) MetricWriter {
@@ -131,7 +130,6 @@ func init() {
 				logger.Println("metrics are going to be generated for houston")
 				go mc.metricWriter()
 				NewMetric = newMetricImpl
-				ConcurrentUser = NewMetric(MetricGuage, "concurrent_user", "concurrent user count", map[string]string{"game": "lobby"})
 			} else {
 				logger.Println("metrics are NOT going to be generated. parent is not houston :", filename, string(fn))
 			}