Remove unneeded annotations and some cleanup

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt

@@ -10,6 +10,8 @@ import eu.kanade.tachiyomi.R
  */
 class PreferenceKeys(context: Context) {
 
+    val theme = context.getString(R.string.pref_theme_key)
+
     val rotation = context.getString(R.string.pref_rotation_type_key)
 
     val enableTransitions = context.getString(R.string.pref_enable_transitions_key)
@@ -78,6 +80,8 @@ class PreferenceKeys(context: Context) {
 
     val filterUnread = context.getString(R.string.pref_filter_unread_key)
 
+    val automaticUpdateStatus = context.getString(R.string.pref_enable_automatic_updates_key)
+
     fun sourceUsername(sourceId: Int) = "pref_source_username_$sourceId"
 
     fun sourcePassword(sourceId: Int) = "pref_source_password_$sourceId"

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -13,7 +13,7 @@ import java.io.IOException
 
 fun <T> Preference<T>.getOrDefault(): T = get() ?: defaultValue()!!
 
-class PreferencesHelper(private val context: Context) {
+class PreferencesHelper(context: Context) {
 
     val keys = PreferenceKeys(context)
 
@@ -32,28 +32,9 @@ class PreferencesHelper(private val context: Context) {
         }
     }
 
-    companion object {
+    fun clear() = prefs.edit().clear().apply()
 
-        fun getLibraryUpdateInterval(context: Context): Int {
-            return PreferenceManager.getDefaultSharedPreferences(context).getInt(
-                    context.getString(R.string.pref_library_update_interval_key), 0)
-        }
-
-        fun getAutomaticUpdateStatus(context: Context): Boolean {
-            return PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
-                    context.getString(R.string.pref_enable_automatic_updates), false)
-        }
-
-        @JvmStatic
-        fun getTheme(context: Context): Int {
-            return PreferenceManager.getDefaultSharedPreferences(context).getInt(
-                    context.getString(R.string.pref_theme_key), 1)
-        }
-    }
-
-    fun clear() {
-        prefs.edit().clear().apply()
-    }
+    fun theme() = prefs.getInt(keys.theme, 1)
 
     fun rotation() = rxPrefs.getInteger(keys.rotation, 1)
 
@@ -147,4 +128,6 @@ class PreferencesHelper(private val context: Context) {
 
     fun filterUnread() = rxPrefs.getBoolean(keys.filterUnread, false)
 
+    fun automaticUpdateStatus() = prefs.getBoolean(keys.automaticUpdateStatus, false)
+
 }