ONOS-3704 - Cleaning up Maven build warning messages and cleaning up some versions of thirdparty libraries.

Change-Id: Id578e10713d41b6c02e92cb2c6e17a4da0787b52
diff --git a/pom.xml b/pom.xml
index f2b0a8a..1b47313 100644
--- a/pom.xml
+++ b/pom.xml
@@ -146,7 +146,6 @@
                             org.onlab.rest.*,
                             org.onosproject.*,
                             org.onlab.util.*,
-                            org.jboss.netty.util.*
                         </Import-Package>
                         <Web-ContextPath>${web.context}</Web-ContextPath>
                     </instructions>