diff --git a/app/build.gradle b/app/build.gradle
index f8a58aa07..90147f870 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,8 +1,10 @@
-apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-android-extensions'
-apply plugin: 'kotlin-kapt'
-apply plugin: 'de.timfreiheit.resourceplaceholders'
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+    id 'kotlin-android-extensions'
+    id 'kotlin-kapt'
+    id 'de.timfreiheit.resourceplaceholders'
+}
 
 def keystorePropertiesFile = rootProject.file("keystore.properties")
 def keystoreProperties = new Properties()
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Config.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Config.kt
index a9d9b7c74..40628dfa6 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Config.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Config.kt
@@ -3,8 +3,6 @@ package com.simplemobiletools.calendar.pro.helpers
 import android.content.Context
 import android.media.AudioManager
 import android.media.RingtoneManager
-import android.os.Environment
-import android.os.Environment.DIRECTORY_DOWNLOADS
 import com.simplemobiletools.calendar.pro.R
 import com.simplemobiletools.calendar.pro.extensions.config
 import com.simplemobiletools.calendar.pro.extensions.scheduleCalDAVSync
@@ -261,18 +259,6 @@ class Config(context: Context) : BaseConfig(context) {
         get() = prefs.getBoolean(WAS_FILTERED_OUT_WARNING_SHOWN, false)
         set(wasFilteredOutWarningShown) = prefs.edit().putBoolean(WAS_FILTERED_OUT_WARNING_SHOWN, wasFilteredOutWarningShown).apply()
 
-    var autoBackup: Boolean
-        get() = prefs.getBoolean(AUTO_BACKUP, false)
-        set(autoBackup) = prefs.edit().putBoolean(AUTO_BACKUP, autoBackup).apply()
-
-    var autoBackupFolder: String
-        get() = prefs.getString(AUTO_BACKUP_FOLDER, Environment.getExternalStoragePublicDirectory(DIRECTORY_DOWNLOADS).absolutePath)!!
-        set(autoBackupFolder) = prefs.edit().putString(AUTO_BACKUP_FOLDER, autoBackupFolder).apply()
-
-    var autoBackupFilename: String
-        get() = prefs.getString(AUTO_BACKUP_FILENAME, "")!!
-        set(autoBackupFilename) = prefs.edit().putString(AUTO_BACKUP_FILENAME, autoBackupFilename).apply()
-
     var autoBackupEventTypes: Set<String>
         get() = prefs.getStringSet(AUTO_BACKUP_EVENT_TYPES, HashSet())!!
         set(autoBackupEventTypes) = prefs.edit().remove(AUTO_BACKUP_EVENT_TYPES).putStringSet(AUTO_BACKUP_EVENT_TYPES, autoBackupEventTypes).apply()
@@ -289,7 +275,4 @@ class Config(context: Context) : BaseConfig(context) {
         get() = prefs.getBoolean(AUTO_BACKUP_PAST_ENTRIES, true)
         set(autoBackupPastEntries) = prefs.edit().putBoolean(AUTO_BACKUP_PAST_ENTRIES, autoBackupPastEntries).apply()
 
-    var lastAutoBackupTime: Long
-        get() = prefs.getLong(LAST_AUTO_BACKUP_TIME, 0L)
-        set(lastAutoBackupTime) = prefs.edit().putLong(LAST_AUTO_BACKUP_TIME, lastAutoBackupTime).apply()
 }