Or this?

worldedit-core/src/main/java/com/sk89q/worldedit/world/block/BlockType.java

@@ -47,8 +47,6 @@ import java.util.stream.IntStream;
 import javax.annotation.Nullable;
 
 public class BlockType implements FawePattern, Keyed {
-    protected static final BlockType DUMMY = new BlockType();
-
     public static final NamespacedRegistry<BlockType> REGISTRY = new NamespacedRegistry<>("block type");
 
     private final String id;
@@ -57,12 +55,6 @@ public class BlockType implements FawePattern, Keyed {
     private boolean initItemType;
     private ItemType itemType;
 
-    // Dummy
-    private BlockType() {
-        this.id = null;
-        this.settings = null;
-    }
-
     protected BlockType(String id, int internalId, List<BlockState> states) {
         int i = id.indexOf("[");
         this.id = i == -1 ? id : id.substring(0, i);