Cleaned up warnings.
diff --git a/src/main/java/net/onrc/onos/graph/LocalTopologyEventListener.java b/src/main/java/net/onrc/onos/graph/LocalTopologyEventListener.java
index c34ba69..40f5044 100644
--- a/src/main/java/net/onrc/onos/graph/LocalTopologyEventListener.java
+++ b/src/main/java/net/onrc/onos/graph/LocalTopologyEventListener.java
@@ -1,7 +1,5 @@
 package net.onrc.onos.graph;
 
-import java.util.Map;
-
 import net.onrc.onos.ofcontroller.core.INetMapTopologyObjects.IPortObject;
 
 import org.slf4j.Logger;
diff --git a/src/main/java/net/onrc/onos/ofcontroller/linkdiscovery/ILinkDiscovery.java b/src/main/java/net/onrc/onos/ofcontroller/linkdiscovery/ILinkDiscovery.java
index 0b4437b..cdb71be 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/linkdiscovery/ILinkDiscovery.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/linkdiscovery/ILinkDiscovery.java
@@ -3,7 +3,7 @@
 import net.floodlightcontroller.core.IUpdate;
 
 import org.codehaus.jackson.map.annotate.JsonSerialize;
-import org.codehaus.jackson.map.ser.ToStringSerializer;
+import org.codehaus.jackson.map.ser.std.ToStringSerializer;
 import org.openflow.util.HexString;
 
 public interface ILinkDiscovery {