replace groovy code with ability in card script

release/Magarena/scripts/Arbor_Elf.groovy

@@ -1,32 +0,0 @@
-[
-    new MagicPermanentActivation(
-        new MagicActivationHints(MagicTiming.Tapping),
-        "Untap"
-    ) {
-
-        @Override
-        public Iterable<MagicEvent> getCostEvent(final MagicPermanent source) {
-            return [new MagicTapEvent(source)];
-        }
-
-        @Override
-        public MagicEvent getPermanentEvent(final MagicPermanent source,final MagicPayedCost payedCost) {
-            return new MagicEvent(
-                source,
-                MagicTargetChoice.POS_TARGET_FOREST,
-                MagicTapTargetPicker.Untap,
-                this,
-                "Untap target Forest\$."
-            );
-        }
-
-        @Override
-        public void executeEvent(final MagicGame game, final MagicEvent event) {
-            event.processTargetPermanent(game,new MagicPermanentAction() {
-                public void doAction(final MagicPermanent forest) {
-                    game.doAction(new MagicUntapAction(forest));
-                }
-            });
-        }
-    }
-]

release/Magarena/scripts/Arbor_Elf.txt

@@ -7,5 +7,5 @@ type=Creature
 subtype=Elf,Druid
 cost={G}
 pt=1/1
+ability=pay {T} Untap target Forest.
 timing=main
-requires_groovy_code