replace groovy code with card script

release/Magarena/scripts/Commander_s_Authority.groovy

@@ -1,25 +0,0 @@
-[
-    new MagicAtUpkeepTrigger() {
-        @Override
-        public MagicEvent executeTrigger(
-                final MagicGame game,
-                final MagicPermanent permanent,
-                final MagicPlayer upkeepPlayer) {
-            final MagicPermanent enchanted = permanent.getEnchantedCreature();
-            return enchanted.isController(upkeepPlayer) ?
-                new MagicEvent(
-                    enchanted,
-                    this,
-                    "PN puts a 1/1 white Human creature token onto the battlefield."
-                ) :
-                MagicEvent.NONE;
-        }
-        @Override
-        public void executeEvent(final MagicGame game, final MagicEvent event) {
-            game.doAction(new MagicPlayTokenAction(
-                event.getPlayer(),
-                TokenCardDefinitions.get("1/1 white Human creature token")
-            ));
-        }
-    }
-]

release/Magarena/scripts/Commander_s_Authority.txt

@@ -6,6 +6,6 @@ rarity=U
 type=Enchantment
 subtype=Aura
 cost={4}{W}
+given_ability=your upkeep effect PN puts a 1/1 white Human creature token onto the battlefield.
 timing=aura
 enchant=pump,pos creature
-requires_groovy_code