Simplify statement because the variable never gets null

Change-Id: I6f733f760c839b8626209f3ba4853e1bea912ff8
diff --git a/drivers/src/main/java/org/onosproject/driver/ovsdb/OvsdbBridgeConfig.java b/drivers/src/main/java/org/onosproject/driver/ovsdb/OvsdbBridgeConfig.java
index c8960d2..90a5a88 100644
--- a/drivers/src/main/java/org/onosproject/driver/ovsdb/OvsdbBridgeConfig.java
+++ b/drivers/src/main/java/org/onosproject/driver/ovsdb/OvsdbBridgeConfig.java
@@ -16,7 +16,6 @@
 package org.onosproject.driver.ovsdb;
 
 import java.util.Collection;
-import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
 
@@ -75,7 +74,7 @@
                                                                          ownDeviceId);
             bridges.add(description);
         });
-        return bridges == null ? Collections.emptySet() : bridges;
+        return bridges;
     }
 
     @Override