Removed unused class: VersionedValue

-package org.onlab.onos.store.link.impl;
-
-import java.util.Objects;
-
-import org.onlab.onos.store.Timestamp;
-
-// TODO: remove once we stop using this
-/**
- * Wrapper class for a entity that is versioned
- * and can either be up or down.
- *
- * @param <T> type of the value.
- */
-public class VersionedValue<T> {
-    private final T entity;
-    private final Timestamp timestamp;
-    private final boolean isUp;
-
-    public VersionedValue(T entity, boolean isUp, Timestamp timestamp) {
-        this.entity = entity;
-        this.isUp = isUp;
-        this.timestamp = timestamp;
-    }
-
-    /**
-     * Returns the value.
-     * @return value.
-     */
-    public T entity() {
-        return entity;
-    }
-
-    /**
-     * Tells whether the entity is up or down.
-     * @return true if up, false otherwise.
-     */
-    public boolean isUp() {
-        return isUp;
-    }
-
-    /**
-     * Returns the timestamp (version) associated with this entity.
-     * @return timestamp.
-     */
-    public Timestamp timestamp() {
-        return timestamp;
-    }
-
-
-    @Override
-    public int hashCode() {
-        return Objects.hash(entity, timestamp, isUp);
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) {
-            return true;
-        }
-        if (obj == null) {
-            return false;
-        }
-        if (getClass() != obj.getClass()) {
-            return false;
-        }
-        @SuppressWarnings("unchecked")
-        VersionedValue<T> that = (VersionedValue<T>) obj;
-        return Objects.equals(this.entity, that.entity) &&
-                Objects.equals(this.timestamp, that.timestamp) &&
-                Objects.equals(this.isUp, that.isUp);
-    }
-
-    // Default constructor for serializer
-    protected VersionedValue() {
-        this.entity = null;
-        this.isUp = false;
-        this.timestamp = null;
-    }
-}