onos_6215:removing printing null object

Change-Id: I3ee0740143f1305ebef2e67c9a3bfbbcab21c965
diff --git a/providers/ietfte/topology/src/main/java/org/onosproject/provider/te/topology/TeTopologyRestconfProvider.java b/providers/ietfte/topology/src/main/java/org/onosproject/provider/te/topology/TeTopologyRestconfProvider.java
index c87811c..8a0589a 100644
--- a/providers/ietfte/topology/src/main/java/org/onosproject/provider/te/topology/TeTopologyRestconfProvider.java
+++ b/providers/ietfte/topology/src/main/java/org/onosproject/provider/te/topology/TeTopologyRestconfProvider.java
@@ -262,8 +262,8 @@
                                         YangProtocolEncodingFormat.JSON,
                                         YmsOperationType.QUERY_REPLY);
 
-        if ((yo == null)) {
-            log.error("YMS decoder returns {} for restconf {}", yo, deviceId);
+        if (yo == null) {
+            log.error("YMS decoder returns null for restconf {}", deviceId);
             return;
         }