nit

Author: StefanBratanov

builder/rest/src/main/java/tech/pegasys/teku/builder/rest/ResponseHandler.java

@@ -39,7 +39,7 @@ public class ResponseHandler<T> {
 
   private static final Logger LOG = LogManager.getLogger();
 
-  public static final ResponseHandler<Void> VOID = new ResponseHandler<>();
+  public static final ResponseHandler<Void> VOID = new ResponseHandler<>(Optional.empty());
 
   private final Int2ObjectMap<Handler<T>> handlers = new Int2ObjectOpenHashMap<>();
   private final Optional<DeserializableTypeDefinition<T>> maybeTypeDefinition;
@@ -48,10 +48,6 @@ public ResponseHandler(final DeserializableTypeDefinition<T> typeDefinition) {
     this(Optional.of(typeDefinition));
   }
 
-  public ResponseHandler() {
-    this(Optional.empty());
-  }
-
   private ResponseHandler(final Optional<DeserializableTypeDefinition<T>> maybeTypeDefinition) {
     this.maybeTypeDefinition = maybeTypeDefinition;
     withHandler(SC_OK, this::defaultOkHandler);