expose addLinkedService at Service interface

Signed-off-by: Eugen Freiter <[email protected]>

Author: Eugen Freiter

Diff for: src/main/java/io/github/hapjava/services/Service.java

@@ -39,6 +39,7 @@ public interface Service {
 
   /**
    * Add linked services
+   *
    * @param service linked service
    */
   void addLinkedService(Service service);

Diff for: src/main/java/io/github/hapjava/services/impl/AbstractServiceImpl.java

@@ -5,8 +5,6 @@
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 abstract class AbstractServiceImpl implements Service {
   private final String type;