refactor(map): 移除计算金币奖励中的多余空行

简化代码结构，删除不必要的空行使逻辑更紧凑。

assets/script/game/map/MissionComp.ts

@@ -135,9 +135,7 @@ export class MissionComp extends CCComp {
     cal_gold_reward(data: any, type: MonType) {
         const cost = MonsterCost[data.uuid] || 1;
         const level = data.lv || 1;
-        
         let add_gold = calculateMonsterGold(data.uuid, level, type);
-        
         smc.updateGold(add_gold, false);
     }