Support to specify Ofdpa extension through REST API

Code clean up for Nicira extension codec.

Change-Id: Idbbfd1ca12b01d46e3b6c90ebce39e6a6605cb58
diff --git a/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/NiciraSetTunnelDstCodec.java b/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/NiciraSetTunnelDstCodec.java
index fc7fa1b..daaf99d 100644
--- a/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/NiciraSetTunnelDstCodec.java
+++ b/drivers/default/src/main/java/org/onosproject/driver/extensions/codec/NiciraSetTunnelDstCodec.java
@@ -52,8 +52,6 @@
 
         Ip4Address tunnelDst = Ip4Address.valueOf(dstIp);
 
-        NiciraSetTunnelDst niciraSetTunnelDst = new NiciraSetTunnelDst(tunnelDst);
-
-        return niciraSetTunnelDst;
+        return new NiciraSetTunnelDst(tunnelDst);
     }
 }