Sonar warning - don't check a value known to be null

Change-Id: I7d6a286b1117944369684848744deaaba29ab7ad
diff --git a/drivers/juniper/src/main/java/org/onosproject/drivers/juniper/ControllerConfigJuniperImpl.java b/drivers/juniper/src/main/java/org/onosproject/drivers/juniper/ControllerConfigJuniperImpl.java
index 500c091..536c1bc 100644
--- a/drivers/juniper/src/main/java/org/onosproject/drivers/juniper/ControllerConfigJuniperImpl.java
+++ b/drivers/juniper/src/main/java/org/onosproject/drivers/juniper/ControllerConfigJuniperImpl.java
@@ -54,7 +54,7 @@
         List<ControllerInfo> controllers = Lists.newArrayList();
         String reply = retrieveResultCommand(buildRpcGetOpenFlowController());
 
-        if (reply == null || (reply != null && reply.isEmpty())) {
+        if (reply == null || reply.isEmpty()) {
             log.error("Cannot get the controllers from switch");
         } else {
             controllers = getOpenFlowControllersFromConfig(XmlConfigParser