refactor: 不要なコードを削除、DI用アノテーションを追加

src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryServiceImpl.kt

@@ -5,8 +5,10 @@ import dev.usbharu.hideout.repository.Users
 import dev.usbharu.hideout.repository.UsersFollowers
 import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
+import org.koin.core.annotation.Single
 import java.time.Instant
 
+@Single
 class FollowerQueryServiceImpl : FollowerQueryService {
     override suspend fun findFollowersById(id: Long): List<User> {
         val followers = Users.alias("FOLLOWERS")

src/main/kotlin/dev/usbharu/hideout/service/user/UserService.kt

@@ -19,8 +19,6 @@ class UserService(
 ) :
     IUserService {
 
-    override suspend fun findByUrls(urls: List<String>): List<User> = userRepository.findByUrls(urls)
-
     override suspend fun usernameAlreadyUse(username: String): Boolean {
         val findByNameAndDomain = userRepository.findByNameAndDomain(username, Config.configData.domain)
         return findByNameAndDomain != null
@@ -64,8 +62,6 @@ class UserService(
         return userRepository.save(userEntity)
     }
 
-    override suspend fun findFollowersById(id: Long): List<User> = userRepository.findFollowersById(id)
-
     // TODO APのフォロー処理を作る
     override suspend fun followRequest(id: Long, followerId: Long): Boolean {
         val user = userRepository.findById(id) ?: throw UserNotFoundException("$id was not found.")