chore: Java 스타일 수정

Author: github-actions

backend/src/main/java/io/f1/backend/domain/game/app/GameService.java

@@ -17,7 +17,6 @@
 import io.f1.backend.domain.game.dto.request.GameSettingChanger;
 import io.f1.backend.domain.game.dto.response.GameResultListResponse;
 import io.f1.backend.domain.game.dto.response.GameResultResponse;
-import io.f1.backend.domain.game.dto.response.PlayerListResponse;
 import io.f1.backend.domain.game.event.GameCorrectAnswerEvent;
 import io.f1.backend.domain.game.event.GameTimeoutEvent;
 import io.f1.backend.domain.game.event.RoomUpdatedEvent;