diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/UiWebSocket.java b/web/gui/src/main/java/org/onosproject/ui/impl/UiWebSocket.java
index 77f0f1f..25c2f03 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/UiWebSocket.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/UiWebSocket.java
@@ -60,8 +60,7 @@
  */
 
 @WebSocket
-public class UiWebSocket
-        implements UiConnection {
+public class UiWebSocket implements UiConnection {
 
     private static final Logger log = LoggerFactory.getLogger(UiWebSocket.class);
 
@@ -88,10 +87,6 @@
 
     private static final long MAX_AGE_MS = 30_000;
 
-    private static final byte PING = 0x9;
-    private static final byte PONG = 0xA;
-    private static final byte[] PING_DATA = new byte[]{(byte) 0xde, (byte) 0xad};
-
     private final ObjectMapper mapper = new ObjectMapper();
     private final ServiceDirectory directory;
     private final UiTopoSession topoSession;