Ozg 3936 refactor user profile url provider

alfa-service/src/main/java/de/ozgcloud/alfa/collaboration/CollaborationModelAssembler.java

@@ -36,7 +36,6 @@ import org.springframework.stereotype.Component;
 
 import de.ozgcloud.alfa.collaboration.CollaborationController.CollaborationByVorgangController;
 import de.ozgcloud.alfa.common.CollectionModelBuilder;
-import de.ozgcloud.alfa.common.ModelBuilder;
 import de.ozgcloud.alfa.common.command.CommandController;
 import de.ozgcloud.alfa.vorgang.VorgangController;
 import de.ozgcloud.alfa.vorgang.VorgangWithEingang;
@@ -53,10 +52,8 @@ class CollaborationModelAssembler implements RepresentationModelAssembler<Collab
 	@Override
 	public EntityModel<Collaboration> toModel(Collaboration collaboration) {
 		var selfLink = linkTo(methodOn(CollaborationController.class).getById(collaboration.getId())).withSelfRel();
-
-		return ModelBuilder.fromEntity(collaboration)
-				.addLink(selfLink)
-				.buildModel();
+		return EntityModel.of(collaboration)
+				.add(selfLink);
 	}
 
 	public CollectionModel<EntityModel<Collaboration>> toCollectionModel(Stream<? extends Collaboration> entities, String vorgangId) {