Remove useless method and modify tests

src/main/java/fr/igred/omero/AnnotatableWrapper.java

@@ -838,7 +838,7 @@ public List<FileAnnotationWrapper> getFileAnnotations(Client client)
      */
     public <A extends GenericAnnotationWrapper<?>> void unlink(Client client, A annotation)
     throws ServiceException, AccessException, ExecutionException, OMEROServerError, InterruptedException {
-        removeLink(client, annotationLinkType(), annotation.getId());
+        removeLinks(client, annotationLinkType(), Collections.singletonList(annotation.getId()));
     }
 
 
@@ -861,25 +861,6 @@ public <A extends GenericAnnotationWrapper<?>> void unlink(Client client, Collec
     }
 
 
-    /**
-     * Removes the link of the given type with the given child ID.
-     *
-     * @param client   The client handling the connection.
-     * @param linkType The link type.
-     * @param childId  Link child ID.
-     *
-     * @throws ServiceException     Cannot connect to OMERO.
-     * @throws AccessException      Cannot access data.
-     * @throws ExecutionException   A Facility can't be retrieved or instantiated.
-     * @throws OMEROServerError     Server error.
-     * @throws InterruptedException If block(long) does not return.
-     */
-    protected void removeLink(Client client, String linkType, long childId)
-    throws ServiceException, OMEROServerError, AccessException, ExecutionException, InterruptedException {
-        removeLinks(client, linkType, Collections.singletonList(childId));
-    }
-
-
     /**
      * Removes the link of the given type with the given child IDs.
      *

src/test/java/fr/igred/omero/repository/FolderTest.java

@@ -269,7 +269,7 @@ void testAddAndRemoveTagFromFolder() throws Exception {
 
         List<TagAnnotationWrapper> tags = folder.getTags(client);
         assertEquals(1, tags.size());
-        folder.unlink(client, tags.get(0));
+        folder.unlink(client, tags);
 
         List<TagAnnotationWrapper> removed = folder.getTags(client);
         assertEquals(0, removed.size());