2 files changed, 4 insertions, 10 deletions
diff --git a/kamon-core/src/main/scala/akka/instrumentation/ActorMessagePassingTracing.scala b/kamon-core/src/main/scala/akka/instrumentation/ActorMessagePassingTracing.scala
index 7766b3a1..9ef43bbe 100644
--- a/kamon-core/src/main/scala/akka/instrumentation/ActorMessagePassingTracing.scala
+++ b/kamon-core/src/main/scala/akka/instrumentation/ActorMessagePassingTracing.scala
@@ -24,7 +24,7 @@ import kamon.trace._
 import kamon.metrics.{ ActorMetrics, Metrics }
 import kamon.Kamon
 import kamon.metrics.ActorMetrics.ActorMetricRecorder
-import kamon.metrics.instruments.counter.{ Counter, MinMaxCounter }
+import kamon.metrics.instruments.counter.MinMaxCounter
 
 @Aspect
 class BehaviourInvokeTracing {
@@ -114,7 +114,7 @@ class BehaviourInvokeTracing {
 trait ActorCellMetrics {
   var metricIdentity: ActorMetrics = _
   var actorMetricsRecorder: Option[ActorMetricRecorder] = _
-  val queueSize: Counter = MinMaxCounter()
+  val queueSize  = MinMaxCounter()
 }
 
 @Aspect
diff --git a/kamon-core/src/main/scala/kamon/metrics/instruments/counter/MinMaxCounter.scala b/kamon-core/src/main/scala/kamon/metrics/instruments/counter/MinMaxCounter.scala
index 052c7bcd..ed83f4bc 100644
--- a/kamon-core/src/main/scala/kamon/metrics/instruments/counter/MinMaxCounter.scala
+++ b/kamon-core/src/main/scala/kamon/metrics/instruments/counter/MinMaxCounter.scala
@@ -19,13 +19,7 @@ import java.lang.Math._
 import jsr166e.LongMaxUpdater
 import kamon.util.PaddedAtomicLong
 
-sealed trait Counter {
-  def increment(value: Long = 1L): Unit
-  def decrement(value: Long = 1L): Unit
-  def collect(): (Long, Long, Long)
-}
-
-class MinMaxCounter extends Counter {
+class MinMaxCounter {
   private val min = new LongMaxUpdater
   private val max = new LongMaxUpdater
   private val sum = new PaddedAtomicLong
@@ -53,5 +47,5 @@ class MinMaxCounter extends Counter {
 }
 
 object MinMaxCounter {
-  def apply(): Counter = new MinMaxCounter()
+  def apply() = new MinMaxCounter()
 }