Remove /memory api

Author: ningyougang

core/invoker/src/main/scala/org/apache/openwhisk/core/containerpool/v2/InvokerHealthManager.scala

@@ -153,7 +153,6 @@ class InvokerHealthManager(instanceId: InvokerInstanceId,
           data.memory.inProgressMemory,
           instanceId.tags,
           instanceId.dedicatedNamespaces)
-        InvokerHealthManager.useMemory = invokerResourceMessage.busyMemory + invokerResourceMessage.inProgressMemory
         dataManagementService ! UpdateDataOnChange(InvokerKeys.health(instanceId), invokerResourceMessage.serialize)
         stay using data.copy(currentInvokerResource = Some(invokerResourceMessage))
 
@@ -270,7 +269,6 @@ object InvokerHealthManager {
   val healthActionNamePrefix = "invokerHealthTestAction"
   val bufferSize = 10
   val bufferErrorTolerance = 3
-  var useMemory = 0l
   val healthActionIdentity: Identity = {
     val whiskSystem = "whisk.system"
     val uuid = UUID()

core/invoker/src/main/scala/org/apache/openwhisk/core/invoker/FPCInvokerServer.scala

@@ -22,7 +22,6 @@ import akka.http.scaladsl.model.StatusCodes
 import akka.http.scaladsl.model.headers.BasicHttpCredentials
 import akka.http.scaladsl.server.Route
 import org.apache.openwhisk.common.{Logging, TransactionId}
-import org.apache.openwhisk.core.containerpool.v2.InvokerHealthManager
 import org.apache.openwhisk.http.BasicRasService
 import org.apache.openwhisk.http.ErrorResponse.terminate
 import spray.json.PrettyPrinter
@@ -48,8 +47,6 @@ class FPCInvokerServer(val invoker: InvokerCore, systemUsername: String, systemP
           invoker.enable()
         } ~ (path("disable") & post) {
           invoker.disable()
-        } ~ (path("memory") & get) {
-          complete(InvokerHealthManager.useMemory.toString)
         }
       case _ => terminate(StatusCodes.Unauthorized)
     }