Remove unused and incorrect imports.
@@ -6,12 +6,6 @@ import com.yahoo.jdisc.Metric;
import com.yahoo.log.LogLevel;
import com.yahoo.messagebus.*;
import com.yahoo.clientmetrics.RouteMetricSet;
-import sun.rmi.runtime.Log;
-
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Logger;
