Remove unused import for Collections in TravelService

Author: otaviojava

src/main/java/expert/os/demos/travel/TravelService.java

@@ -9,7 +9,6 @@
 import org.eclipse.jnosql.mapping.DatabaseType;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 import java.util.UUID;
 import java.util.logging.Logger;