Trivial simplification of broker initialization by removing unnecessary assignment.

broker/src/main/java/org/apache/rocketmq/broker/BrokerController.java

@@ -188,9 +188,7 @@ public class BrokerController {
     }
 
     public boolean initialize() throws CloneNotSupportedException {
-        boolean result = true;
-
-        result = result && this.topicConfigManager.load();
+        boolean result = this.topicConfigManager.load();
 
         result = result && this.consumerOffsetManager.load();
         result = result && this.subscriptionGroupManager.load();