Remove beta webtoon viewer split page

This had a bunch of issues around split pages not showing up properly so things
end up appearing to be missing while reading.
It'd be more worthwhile redoing the reader viewers than trying to get this to work
properly. It'd be better to just enable the split pages on download instead.

Closes #8433

app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupFileValidator.kt

@@ -58,5 +58,8 @@ class BackupFileValidator(
         return Results(missingSources, missingTrackers)
     }
 
-    data class Results(val missingSources: List<String>, val missingTrackers: List<String>)
+    data class Results(
+        val missingSources: List<String>,
+        val missingTrackers: List<String>,
+    )
 }

app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupRestoreJob.kt

@@ -26,7 +26,7 @@ class BackupRestoreJob(private val context: Context, workerParams: WorkerParamet
     override suspend fun doWork(): Result {
         val uri = inputData.getString(LOCATION_URI_KEY)?.toUri()
             ?: return Result.failure()
-        val sync = inputData.getBoolean(SYNC, false)
+        val sync = inputData.getBoolean(SYNC_KEY, false)
 
         try {
             setForeground(getForegroundInfo())
@@ -67,7 +67,7 @@ class BackupRestoreJob(private val context: Context, workerParams: WorkerParamet
         fun start(context: Context, uri: Uri, sync: Boolean = false) {
             val inputData = workDataOf(
                 LOCATION_URI_KEY to uri.toString(),
-                SYNC to sync,
+                SYNC_KEY to sync,
             )
             val request = OneTimeWorkRequestBuilder<BackupRestoreJob>()
                 .addTag(TAG)
@@ -85,5 +85,4 @@ class BackupRestoreJob(private val context: Context, workerParams: WorkerParamet
 private const val TAG = "BackupRestore"
 
 private const val LOCATION_URI_KEY = "location_uri" // String
-
-private const val SYNC = "sync" // Boolean
+private const val SYNC_KEY = "sync" // Boolean