[O] Refactor chusan repos

src/main/java/icu/samnyan/aqua/sega/ongeki/dao/userdata/UserDataRepository.kt

@@ -5,7 +5,6 @@ import icu.samnyan.aqua.sega.general.model.Card
 import icu.samnyan.aqua.sega.ongeki.model.userdata.UserData
 import org.springframework.stereotype.Repository
 import org.springframework.transaction.annotation.Transactional
-import java.util.*
 
 /**
  * @author samnyan (privateamusement@protonmail.com)
@@ -14,8 +13,6 @@ import java.util.*
 interface UserDataRepository : GenericUserDataRepo<UserData> {
     fun findByCard_ExtIdIn(userIds: Collection<Long>): List<UserData>
 
-    fun findByCard_ExtId(aimeId: Long): Optional<UserData>
-
     @Transactional
     fun deleteByCard(card: Card)
 }