Remove unused import in OSDelegatingFileTailingMP

Author: artembilan

spring-integration-file/src/main/java/org/springframework/integration/file/tail/OSDelegatingFileTailingMessageProducer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -20,7 +20,6 @@
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.time.Instant;
-import java.util.Date;
 
 import org.springframework.messaging.MessagingException;
 import org.springframework.scheduling.SchedulingAwareRunnable;