Remove unused executor field

Change-Id: I1f0e531fe2099b08848f3a9bbc3e5593c1332e69
diff --git a/core/store/dist/src/main/java/org/onosproject/store/core/impl/ConsistentApplicationIdStore.java b/core/store/dist/src/main/java/org/onosproject/store/core/impl/ConsistentApplicationIdStore.java
index e54b0ee..7c3769a 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/core/impl/ConsistentApplicationIdStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/core/impl/ConsistentApplicationIdStore.java
@@ -19,8 +19,6 @@
 
 import java.util.Map;
 import java.util.Set;
-import java.util.concurrent.ScheduledExecutorService;
-
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Deactivate;
@@ -61,7 +59,6 @@
     private ConsistentMap<String, ApplicationId> registeredIds;
     private Map<String, ApplicationId> nameToAppIdCache = Maps.newConcurrentMap();
     private Map<Short, ApplicationId> idToAppIdCache = Maps.newConcurrentMap();
-    private ScheduledExecutorService executor;
 
     private static final Serializer SERIALIZER = Serializer.using(new KryoNamespace.Builder()
                                                                         .register(KryoNamespaces.API)
@@ -88,7 +85,6 @@
 
     @Deactivate
     public void deactivate() {
-        executor.shutdown();
         log.info("Stopped");
     }