ONOS-4415 Remove OmsPort out of core.

Change-Id: Ic796c4e715789ba18f350f28e29db04dd537822f
diff --git a/core/api/src/main/java/org/onosproject/net/OmsPort.java b/core/api/src/main/java/org/onosproject/net/OmsPort.java
index 206a0c8..e1e54ca 100644
--- a/core/api/src/main/java/org/onosproject/net/OmsPort.java
+++ b/core/api/src/main/java/org/onosproject/net/OmsPort.java
@@ -28,7 +28,10 @@
  * See ITU G.709 "Interfaces for the Optical Transport Network (OTN)"
  *
  * Assumes we only support fixed grid for now.
+ *
+ * @deprecated in Goldeneye (1.6.0)
  */
+@Deprecated
 public class OmsPort extends DefaultPort {
 
     private final Frequency minFrequency;     // Minimum frequency