CostPayLife: refund never called and doesn't work

negative amount can't be paid in the function

forge-game/src/main/java/forge/game/cost/CostPayLife.java

@@ -57,17 +57,6 @@ public class CostPayLife extends CostPart {
         return sb.toString();
     }
 
-    /*
-     * (non-Javadoc)
-     * 
-     * @see forge.card.cost.CostPart#refund(forge.Card)
-     */
-    @Override
-    public final void refund(final Card source) {
-        // Really should be activating player
-        source.getController().payLife(this.paidAmount * -1, null);
-    }
-
     /*
      * (non-Javadoc)
      *