ADD: hot_scene_type

recommend-server-service/src/main/java/com/tzld/piaoquan/recommend/server/service/ViewedService.java

@@ -17,7 +17,6 @@ import org.springframework.stereotype.Service;
 
 import javax.annotation.PostConstruct;
 import java.util.*;
-import java.util.concurrent.TimeUnit;
 
 /**
  * @author dyp