[ONOS-3867] Class cast exception bug fix

Change-Id: Ibb31290f2eb6a033b019c2be33af6c4139d1e79b
diff --git a/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/impl/OpenstackSwitchingManager.java b/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/impl/OpenstackSwitchingManager.java
index 49dff3f..63c8f49 100644
--- a/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/impl/OpenstackSwitchingManager.java
+++ b/apps/openstackswitching/app/src/main/java/org/onosproject/openstackswitching/impl/OpenstackSwitchingManager.java
@@ -461,12 +461,6 @@
                     case DEVICE_ADDED:
                         processDeviceAdded((Device) deviceEvent.subject());
                         break;
-                    case DEVICE_UPDATED:
-                        Port port = (Port) deviceEvent.subject();
-                        if (port.isEnabled()) {
-                            processPortUpdated((Device) deviceEvent.subject(), deviceEvent.port());
-                        }
-                        break;
                     case DEVICE_AVAILABILITY_CHANGED:
                         Device device = (Device) deviceEvent.subject();
                         if (deviceService.isAvailable(device.id())) {