턴 버그 수정, 아이템 관련 구 코드 수정

hwe/sammo/WarUnit.php

@@ -300,27 +300,11 @@ class WarUnit{
         throw new NotInheritedMethodException();
     }
 
-    function useBattleInitItem():bool{
-        return false;
-    }
-
     function beginPhase():void{
         $this->clearActivatedSkill();
         $this->computeWarPower();
     }
 
-    function checkBattleBeginSkill(){
-        yield true;
-    }
-
-    function checkBattleBeginItem():bool{
-        return false;
-    }
-
-    function applyBattleBeginSkillAndItem():bool{
-        return false;
-    }
-
     function hasActivatedSkill(string $skillName):bool{
         return $this->activatedSkill[$skillName] ?? false;
     }