Start work on the Sponge schematic format. This should work but it may not, it's untested.

worldedit-core/src/main/java/com/sk89q/worldedit/blocks/BaseBlock.java

@@ -111,18 +111,6 @@ public class BaseBlock implements BlockStateHolder<BaseBlock>, TileEntityBlock {
         this(other.toImmutableState(), other.getNbtData());
     }
 
-    /**
-     * Get the block's data value.
-     *
-     * Broken - do not use
-     *
-     * @return data value (0-15)
-     */
-    @Deprecated
-    public int getData() {
-        return 0;
-    }
-
     /**
      * Gets a map of state to statevalue
      *