remove unused import declaration

Author: thomsound

complete/src/main/java/com/example/messagingredis/MessagingRedisApplication.java

@@ -1,7 +1,5 @@
 package com.example.messagingredis;
 
-import java.util.concurrent.CountDownLatch;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.boot.SpringApplication;