Remove unused foEach method from workflowModelCollection interface (#938)

Signed-off-by: fjtirado <ftirados@redhat.com>

Author: fjtirado

impl/core/src/main/java/io/serverlessworkflow/impl/WorkflowModelCollection.java

@@ -20,12 +20,9 @@
 import java.util.Collection;
 import java.util.Map;
 import java.util.Optional;
-import java.util.function.BiConsumer;
 
 public interface WorkflowModelCollection extends WorkflowModel, Collection<WorkflowModel> {
 
-  default void forEach(BiConsumer<String, WorkflowModel> consumer) {}
-
   @Override
   default Collection<WorkflowModel> asCollection() {
     return this;