Cleanup.

src/main/java/de/dennisguse/opentracks/content/data/DataField.java

@@ -1,6 +1,5 @@
 package de.dennisguse.opentracks.content.data;
 
-import android.content.Context;
 import android.content.res.Resources;
 
 import de.dennisguse.opentracks.R;

src/main/java/de/dennisguse/opentracks/io/file/importer/DirectoryChooserActivity.java

@@ -38,11 +38,6 @@ public abstract class DirectoryChooserActivity extends AppCompatActivity {
         onActivityResultCustom(requestCode, resultCode, resultData);
     }
 
-    @Override
-    protected void onDestroy() {
-        super.onDestroy();
-    }
-
     protected void onActivityResultCustom(int requestCode, int resultCode, @Nullable Intent resultData) {
         if (requestCode == DIRECTORY_PICKER_REQUEST_CODE) {
             if (resultCode == Activity.RESULT_OK) {

src/main/java/de/dennisguse/opentracks/services/TrackRecordingService.java

@@ -99,7 +99,6 @@ public class TrackRecordingService extends Service implements TrackPointCreator.
     private final OnSharedPreferenceChangeListener sharedPreferenceChangeListener = new OnSharedPreferenceChangeListener() {
         @Override
         public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
-            Context context = TrackRecordingService.this;
             if (PreferencesUtils.isKey(R.string.stats_units_key, key)) {
                 boolean metricUnits = PreferencesUtils.isMetricUnits();
                 notificationManager.setMetricUnits(metricUnits);

src/main/java/de/dennisguse/opentracks/services/handlers/TrackPointCreator.java

@@ -74,9 +74,7 @@ public class TrackPointCreator {
         altitudeSumManager.reset();
     }
 
-    //TODO TrackPoint should be created by TrackPointCreator; instead of in the TrackRecordingService.
-    @Deprecated
-    public SensorDataSet fill(TrackPoint trackPoint) {
+    private SensorDataSet fill(TrackPoint trackPoint) {
         SensorDataSet sensorDataSet = remoteSensorManager.fill(trackPoint);
         altitudeSumManager.fill(trackPoint);
 

src/main/java/de/dennisguse/opentracks/services/tasks/VoiceAnnouncementManager.java

@@ -23,7 +23,6 @@ import androidx.annotation.VisibleForTesting;
 
 import java.time.Duration;
 
-import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.content.data.Distance;
 import de.dennisguse.opentracks.content.data.Track;
 import de.dennisguse.opentracks.services.TrackRecordingService;

src/main/java/de/dennisguse/opentracks/settings/OpenTracksSettingsFragment.java

@@ -1,10 +1,7 @@
 package de.dennisguse.opentracks.settings;
 
 import android.os.Bundle;
-import android.util.Log;
 
-import androidx.fragment.app.DialogFragment;
-import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
 
 import de.dennisguse.opentracks.R;

src/main/java/de/dennisguse/opentracks/util/ActivityUtils.java

@@ -3,7 +3,6 @@ package de.dennisguse.opentracks.util;
 import android.app.Activity;
 import android.app.SearchManager;
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.os.Build;
 import android.os.VibrationEffect;
 import android.os.Vibrator;
@@ -15,7 +14,6 @@ import android.view.MenuItem;
 import android.widget.AbsListView;
 import android.widget.ListView;
 
-import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.SearchView;
 
 import java.util.ArrayList;