diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/backup/AbstractBackupManager.kt b/app/src/main/java/eu/kanade/tachiyomi/data/backup/AbstractBackupManager.kt
index fa03b1f93..4c03e0261 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/AbstractBackupManager.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/AbstractBackupManager.kt
@@ -6,16 +6,10 @@ import eu.kanade.data.DatabaseHandler
 import eu.kanade.data.toLong
 import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.data.database.models.Manga
-import eu.kanade.tachiyomi.data.database.models.toMangaInfo
 import eu.kanade.tachiyomi.data.library.CustomMangaManager
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.track.TrackManager
-import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.source.SourceManager
-import eu.kanade.tachiyomi.source.model.toSChapter
-import eu.kanade.tachiyomi.source.online.all.EHentai
-import eu.kanade.tachiyomi.util.chapter.syncChaptersWithSource
-import exh.eh.EHentaiThrottleManager
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 import data.Mangas as DbManga
@@ -43,32 +37,6 @@ abstract class AbstractBackupManager(protected val context: Context) {
         return handler.awaitOneOrNull { mangasQueries.getMangaByUrlAndSource(url, source) }
     }
 
-    /**
-     * Fetches chapter information.
-     *
-     * @param source source of manga
-     * @param manga manga that needs updating
-     * @param chapters list of chapters in the backup
-     * @return Updated manga chapters.
-     */
-    internal open suspend fun restoreChapters(source: Source, manga: Manga, chapters: List<Chapter> /* SY --> */, throttleManager: EHentaiThrottleManager /* SY <-- */): Pair<List<Chapter>, List<Chapter>> {
-        // SY -->
-        val fetchedChapters = if (source is EHentai) {
-            source.getChapterList(manga.toMangaInfo(), throttleManager::throttle)
-                .map { it.toSChapter() }
-        } else {
-            source.getChapterList(manga.toMangaInfo())
-                .map { it.toSChapter() }
-        }
-        // SY <--
-        val syncedChapters = syncChaptersWithSource(fetchedChapters, manga, source)
-        if (syncedChapters.first.isNotEmpty()) {
-            chapters.forEach { it.manga_id = manga.id }
-            updateChapters(chapters)
-        }
-        return syncedChapters
-    }
-
     /**
      * Returns list containing manga from library
      *
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/backup/AbstractBackupRestore.kt b/app/src/main/java/eu/kanade/tachiyomi/data/backup/AbstractBackupRestore.kt
index 403b17167..781cbf7f6 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/AbstractBackupRestore.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/AbstractBackupRestore.kt
@@ -3,16 +3,12 @@ package eu.kanade.tachiyomi.data.backup
 import android.content.Context
 import android.net.Uri
 import eu.kanade.data.DatabaseHandler
-import eu.kanade.data.chapter.NoChaptersException
 import eu.kanade.tachiyomi.R
-import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.database.models.Track
 import eu.kanade.tachiyomi.data.library.CustomMangaManager
 import eu.kanade.tachiyomi.data.track.TrackManager
-import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.util.system.createFileInCacheDir
-import exh.eh.EHentaiThrottleManager
 import kotlinx.coroutines.Job
 import uy.kohesive.injekt.injectLazy
 import java.io.File
@@ -36,10 +32,6 @@ abstract class AbstractBackupRestore<T : AbstractBackupManager>(protected val co
     protected var restoreAmount = 0
     protected var restoreProgress = 0
 
-    // SY -->
-    protected val throttleManager = EHentaiThrottleManager()
-    // SY <--
-
     /**
      * Mapping of source ID to source name from backup data
      */
@@ -67,28 +59,6 @@ abstract class AbstractBackupRestore<T : AbstractBackupManager>(protected val co
         return true
     }
 
-    /**
-     * Fetches chapter information.
-     *
-     * @param source source of manga
-     * @param manga manga that needs updating
-     * @return Updated manga chapters.
-     */
-    internal suspend fun updateChapters(source: Source, manga: Manga, chapters: List<Chapter>): Pair<List<Chapter>, List<Chapter>> {
-        return try {
-            backupManager.restoreChapters(source, manga, chapters /* SY --> */, throttleManager /* SY <-- */)
-        } catch (e: Exception) {
-            // If there's any error, return empty update and continue.
-            val errorMessage = if (e is NoChaptersException) {
-                context.getString(R.string.no_chapters_error)
-            } else {
-                e.message
-            }
-            errors.add(Date() to "${manga.title} - $errorMessage")
-            Pair(emptyList(), emptyList())
-        }
-    }
-
     /**
      * Refreshes tracking information.
      *
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/backup/full/FullBackupRestore.kt b/app/src/main/java/eu/kanade/tachiyomi/data/backup/full/FullBackupRestore.kt
index 1fc4d7246..95fd7f170 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/full/FullBackupRestore.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/full/FullBackupRestore.kt
@@ -27,9 +27,6 @@ import java.util.Date
 class FullBackupRestore(context: Context, notifier: BackupNotifier) : AbstractBackupRestore<FullBackupManager>(context, notifier) {
 
     override suspend fun performRestore(uri: Uri): Boolean {
-        // SY -->
-        throttleManager.resetThrottle()
-        // SY <--
         backupManager = FullBackupManager(context)
 
         val backupString = context.contentResolver.openInputStream(uri)!!.source().gzip().buffer().use { it.readByteArray() }