fix : 레이싱게임 추첨시 기존 데이터베이스 내용 삭제 (CC-181) (#51)

src/main/java/ai/softeer/caecae/admin/service/AdminRacingGameService.java

@@ -24,7 +24,6 @@
 public class AdminRacingGameService {
     private final RacingGameRepository racingGameRepository;
     private final RacingGameWinnerRepository racingGameWinnerRepository;
-    private final FindingGameAnswerDbRepository findingGameAnswerDbRepository;
     private final RacingGameInfoRepository racingGameInfoRepository;
 
 
@@ -84,6 +83,7 @@ public List<RacingGameWinnerResponseDto> drawRacingGameWinner() {
             }
         }
         // TODO: 수학적으로 보이기 + 더 나은 방법 생각해보기?
+        racingGameWinnerRepository.deleteAll();
         racingGameWinnerRepository.saveAll(winners);
         return racingGameWinnerResponseDtoList;
     }