Numeric fields "mandatory" are not labeled with the corresponding red

asterisk.
Link to SF Tracker: http://sourceforge.net/support/tracker.php?aid=2977536

zkwebui/WEB-INF/src/org/adempiere/webui/editor/WNumberEditor.java

@@ -50,8 +50,6 @@ public class WNumberEditor extends WEditor implements ContextMenuListener
 
     private BigDecimal oldValue;
 
-    private boolean mandatory = false;
-
 	private int displayType;
 
 	private WEditorPopupMenu popupMenu;
@@ -171,18 +169,6 @@ public class WNumberEditor extends WEditor implements ContextMenuListener
         return getComponent().getValue();
     }
 
-    @Override
-    public boolean isMandatory()
-    {
-        return mandatory;
-    }
-
-    @Override
-    public void setMandatory(boolean mandatory)
-    {
-        this.mandatory = mandatory;
-    }
-
     @Override
     public void setValue(Object value)
     {