replace groovy code with ability in card script

release/Magarena/scripts/Daring_Skyjek.groovy

@@ -1,19 +0,0 @@
-[
-    new MagicBattalionTrigger() {
-        @Override
-        public MagicEvent executeTrigger(
-                final MagicGame game,
-                final MagicPermanent permanent,
-                final MagicPermanent attacker) {
-            return new MagicEvent(
-                permanent,
-                this,
-                "SN gains flying until end of turn."
-            );
-        }
-        @Override
-        public void executeEvent(final MagicGame game, final MagicEvent event) {
-            game.doAction(new MagicGainAbilityAction(event.getPermanent(),MagicAbility.Flying));
-        }
-    }
-]

release/Magarena/scripts/Daring_Skyjek.txt

@@ -7,5 +7,5 @@ type=Creature
 subtype=Human,Knight
 cost={1}{W}
 pt=3/1
+ability=battalion effect SN gains flying until end of turn.
 timing=main
-requires_groovy_code