diff --git a/corona-warn-companion/src/main/java/org/tosl/coronawarncompanion/matchentries/MatchesRecyclerViewAdapter.java b/corona-warn-companion/src/main/java/org/tosl/coronawarncompanion/matchentries/MatchesRecyclerViewAdapter.java
index 2bd7107..cb5348c 100644
--- a/corona-warn-companion/src/main/java/org/tosl/coronawarncompanion/matchentries/MatchesRecyclerViewAdapter.java
+++ b/corona-warn-companion/src/main/java/org/tosl/coronawarncompanion/matchentries/MatchesRecyclerViewAdapter.java
@@ -41,7 +41,6 @@
 import com.github.mikephil.charting.data.LineDataSet;
 import com.github.mikephil.charting.formatter.ValueFormatter;
 
-import org.tosl.coronawarncompanion.CWCApplication;
 import org.tosl.coronawarncompanion.Country;
 import org.tosl.coronawarncompanion.R;
 import org.tosl.coronawarncompanion.diagnosiskeys.DiagnosisKey;
diff --git a/corona-warn-companion/src/main/java/org/tosl/coronawarncompanion/microgreadout/MicroGDbOnDisk.java b/corona-warn-companion/src/main/java/org/tosl/coronawarncompanion/microgreadout/MicroGDbOnDisk.java
index 12118e2..ede38f1 100644
--- a/corona-warn-companion/src/main/java/org/tosl/coronawarncompanion/microgreadout/MicroGDbOnDisk.java
+++ b/corona-warn-companion/src/main/java/org/tosl/coronawarncompanion/microgreadout/MicroGDbOnDisk.java
@@ -1,43 +1,25 @@
 package org.tosl.coronawarncompanion.microgreadout;
 
-import android.Manifest;
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.Context;
-import android.content.pm.PackageManager;
-import android.content.res.AssetManager;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
-import android.os.Environment;
 import android.util.Log;
 
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-
 import com.google.protobuf.ByteString;
 
-import org.iq80.leveldb.CompressionType;
-import org.iq80.leveldb.DBFactory;
-import org.iq80.leveldb.Options;
-import org.iq80.leveldb.impl.Iq80DBFactory;
-import org.tosl.coronawarncompanion.CWCApplication;
 import org.tosl.coronawarncompanion.gmsreadout.ContactRecordsProtos;
 import org.tosl.coronawarncompanion.rpis.RpiList;
 
 import java.io.File;
-import java.io.FileFilter;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.util.Arrays;
-import java.util.regex.Pattern;
 
 import static org.tosl.coronawarncompanion.gmsreadout.Sudo.sudo;
 import static org.tosl.coronawarncompanion.tools.Utils.byteArrayToHexString;
 import static org.tosl.coronawarncompanion.tools.Utils.getDaysFromMillis;
-import static org.tosl.coronawarncompanion.tools.Utils.getDaysFromSeconds;
-import static org.tosl.coronawarncompanion.tools.Utils.hexStringToByteArray;
 
 public class MicroGDbOnDisk {