Fix checkstyle violations in samples

spring-boot-samples/spring-boot-sample-profile/src/main/java/sample/profile/service/MessageService.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2013 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,9 +16,6 @@
 
 package sample.profile.service;
 
-/**
- * @author Dave Syer
- */
 public interface MessageService {
 
 	String getMessage();