Removed unneeded import that was breaking the build.
diff --git a/core/api/src/main/java/org/onlab/onos/net/NetworkResource.java b/core/api/src/main/java/org/onlab/onos/net/NetworkResource.java
index 65bb4e8..faf3241 100644
--- a/core/api/src/main/java/org/onlab/onos/net/NetworkResource.java
+++ b/core/api/src/main/java/org/onlab/onos/net/NetworkResource.java
@@ -16,7 +16,7 @@
 package org.onlab.onos.net;
 
 /**
- * Representation of a network resource.
+ * Representation of a network resource, e.g. a link, lambda, MPLS tag.
  */
 public interface NetworkResource {
 }