Cleanup duplicated field (#8217)

forge-game/src/main/java/forge/game/spellability/SpellAbility.java

@@ -114,7 +114,6 @@ public abstract class SpellAbility extends CardTraitBase implements ISpellAbilit
     private Trigger triggerObj;
     private boolean optionalTrigger = false;
     private ReplacementEffect replacementEffect;
-    private int sourceTrigger = -1;
     private List<Object> triggerRemembered = Lists.newArrayList();
 
     private AlternativeCost altCost = null;
@@ -1347,10 +1346,7 @@ public abstract class SpellAbility extends CardTraitBase implements ISpellAbilit
     }
 
     public int getSourceTrigger() {
-        return sourceTrigger;
-    }
-    public void setSourceTrigger(final int id) {
-        sourceTrigger = id;
+        return isTrigger() ? getTrigger().getId() : -1;
     }
 
     public boolean isReplacementAbility() {

forge-game/src/main/java/forge/game/trigger/TriggerHandler.java

@@ -518,7 +518,6 @@ public class TriggerHandler {
         }
 
         sa.setTrigger(regtrig);
-        sa.setSourceTrigger(regtrig.getId());
         regtrig.setTriggeringObjects(sa, runParams);
         sa.setTriggerRemembered(regtrig.getTriggerRemembered());
 

forge-game/src/main/java/forge/game/trigger/WrappedAbility.java

@@ -364,11 +364,6 @@ public class WrappedAbility extends Ability {
         sa.setTargetCard(card);
     }
 
-    @Override
-    public void setSourceTrigger(final int id) {
-        sa.setSourceTrigger(id);
-    }
-
     @Override
     public int getSourceTrigger() {
         return sa.getSourceTrigger();