Cleanup

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

@@ -99,7 +99,6 @@ import androidx.localbroadcastmanager.content.LocalBroadcastManager;
 
 public class ActivityView extends ActivityBilling implements FragmentManager.OnBackStackChangedListener {
     private boolean unified;
-    private boolean threading;
 
     private View view;
     private DrawerLayout drawerLayout;
@@ -145,7 +144,6 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
 
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         unified = prefs.getBoolean("unified", true);
-        threading = prefs.getBoolean("threading", true);
 
         view = LayoutInflater.from(this).inflate(R.layout.activity_view, null);
         setContentView(view);