Cleanup

app/src/main/java/eu/faircode/email/ApplicationEx.java

@@ -106,7 +106,6 @@ public class ApplicationEx extends Application {
 
         MessageHelper.setSystemProperties();
         ContactInfo.init(this, new Handler());
-        Core.init(this);
         WorkerWatchdog.init(this);
     }
 

app/src/main/java/eu/faircode/email/Core.java

@@ -120,15 +120,6 @@ class Core {
     private static final int DOWNLOAD_BATCH_SIZE = 20;
     private static final long YIELD_DURATION = 200L; // milliseconds
 
-    static void init(Context context) {
-        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
-        SharedPreferences.Editor editor = prefs.edit();
-        for (String key : prefs.getAll().keySet())
-            if (key.startsWith("notifying:"))
-                editor.remove(key);
-        editor.apply();
-    }
-
     static void processOperations(
             Context context,
             EntityAccount account, EntityFolder folder,