Remove unused imports

Author: testower

src/main/java/org/entur/gbfs/validation/validator/FileValidator.java

@@ -27,12 +27,10 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.stream.Collectors;
 
 public class FileValidator {
     private static final Logger logger = LoggerFactory.getLogger(FileValidator.class);