diff --git a/oeffi/src/de/schildbach/oeffi/Application.java b/oeffi/src/de/schildbach/oeffi/Application.java
index a61a66a..742b52a 100644
--- a/oeffi/src/de/schildbach/oeffi/Application.java
+++ b/oeffi/src/de/schildbach/oeffi/Application.java
@@ -103,39 +103,6 @@ public class Application extends android.app.Application {
 
         final Stopwatch watch = Stopwatch.createStarted();
 
-        // clean up databases
-        QueryHistoryProvider.cleanupQueryHistory(this);
-
-        // 2017-01-03: migrate OOEVV to use OEBB
-        migrateSelectedNetwork(NetworkId.OOEVV.name(), NetworkId.OEBB);
-        Downloader.deleteDownload(new File(getFilesDir(), NetworkId.OOEVV.name().toLowerCase(Locale.ENGLISH) + ".db"));
-
-        // 2017-01-13: remove Melbourne
-        final String MET = "MET";
-        Downloader.deleteDownload(new File(getFilesDir(), MET.toLowerCase(Locale.ENGLISH) + ".db"));
-
-        // 2017-02-06: remove Philadelphia
-        final String SEPTA = "SEPTA";
-        Downloader.deleteDownload(new File(getFilesDir(), SEPTA.toLowerCase(Locale.ENGLISH) + ".db"));
-
-        // 2017-02-16: remove Provence-Alpes-Côte d'Azur
-        final String PACA = "PACA";
-        migrateSelectedNetwork(PACA, NetworkId.RT);
-        Downloader.deleteDownload(new File(getFilesDir(), PACA.toLowerCase(Locale.ENGLISH) + ".db"));
-
-        // 2017-08-31: migrate BVB to use NVBW
-        final String BVB = "BVB";
-        migrateSelectedNetwork(BVB, NetworkId.NVBW);
-        Downloader.deleteDownload(new File(getFilesDir(), BVB.toLowerCase(Locale.ENGLISH) + ".db"));
-
-        // 2017-09-19: migrate VBB to new station IDs
-        FavoriteStationsProvider.migrateFavoriteStationIds(this, NetworkId.VBB, "9000000", "9600000", 891000000);
-        QueryHistoryProvider.migrateQueryHistoryIds(this, NetworkId.VBB, "9000000", "9600000", 891000000);
-
-        // 2017-09-19: migrate BVG to new station IDs
-        FavoriteStationsProvider.migrateFavoriteStationIds(this, NetworkId.BVG, "9000000", "9600000", 891000000);
-        QueryHistoryProvider.migrateQueryHistoryIds(this, NetworkId.BVG, "9000000", "9600000", 891000000);
-
         // 2018-07-06: migrate IVB to use OEBB
         final String IVB = "IVB";
         migrateSelectedNetwork(IVB, NetworkId.OEBB);
diff --git a/oeffi/src/de/schildbach/oeffi/directions/QueryHistoryProvider.java b/oeffi/src/de/schildbach/oeffi/directions/QueryHistoryProvider.java
index 3d45fce..520aac3 100644
--- a/oeffi/src/de/schildbach/oeffi/directions/QueryHistoryProvider.java
+++ b/oeffi/src/de/schildbach/oeffi/directions/QueryHistoryProvider.java
@@ -436,27 +436,6 @@ public class QueryHistoryProvider extends ContentProvider {
         helper.close();
     }
 
-    /**
-     * Restricted to usage by {@link Application#onCreate()} only.
-     */
-    public static void cleanupQueryHistory(final Context context) {
-        final QueryHistoryHelper helper = new QueryHistoryHelper(context);
-        final SQLiteDatabase db = helper.getWritableDatabase();
-
-        db.beginTransaction();
-        try {
-            db.execSQL("DELETE FROM " + DATABASE_TABLE + " WHERE " + KEY_FROM_TYPE + "=" + TYPE_ANY + " AND "
-                    + KEY_FROM_ID + " IS NOT NULL");
-            db.execSQL("DELETE FROM " + DATABASE_TABLE + " WHERE " + KEY_TO_TYPE + "=" + TYPE_ANY + " AND " + KEY_TO_ID
-                    + " IS NOT NULL");
-            db.setTransactionSuccessful();
-        } finally {
-            db.endTransaction();
-        }
-
-        helper.close();
-    }
-
     private static class QueryHistoryHelper extends SQLiteOpenHelper {
         private static final String DATABASE_NAME = "oeffi";
         private static final int DATABASE_VERSION = 6;