Remove unnecessary sysout (#4897)

diff --git a/core/invoker/src/main/scala/org/apache/openwhisk/core/containerpool/ContainerProxy.scala b/core/invoker/src/main/scala/org/apache/openwhisk/core/containerpool/ContainerProxy.scala
index b7e7cf6..142173e 100644
--- a/core/invoker/src/main/scala/org/apache/openwhisk/core/containerpool/ContainerProxy.scala
+++ b/core/invoker/src/main/scala/org/apache/openwhisk/core/containerpool/ContainerProxy.scala
@@ -633,7 +633,6 @@
       .flatMap(_ => container.destroy()(TransactionId.invokerNanny))
       .map(_ => ContainerRemoved)
       .pipeTo(self)
-    println("removing")
     goto(Removing) using newData
   }