Simplification

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

@@ -236,9 +236,7 @@ abstract class ActivityBilling extends ActivityBase implements PurchasesUpdatedL
         if (purchases != null) {
             SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
             SharedPreferences.Editor editor = prefs.edit();
-
-            if (prefs.getBoolean("play_store", true))
-                editor.remove("pro");
+            editor.remove("pro");
 
             for (Purchase purchase : purchases)
                 try {

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

@@ -39,11 +39,6 @@ public class ActivityMain extends AppCompatActivity implements FragmentManager.O
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         prefs.registerOnSharedPreferenceChangeListener(this);
 
-        if (!Helper.isPlayStoreInstall(this)) {
-            Log.i("Third party install");
-            prefs.edit().putBoolean("play_store", false).apply();
-        }
-
         if (prefs.getBoolean("eula", false)) {
             super.onCreate(savedInstanceState);
             new SimpleTask<List<EntityAccount>>() {