Cleanup using AndroidStudio's code analyzer.

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

@@ -130,7 +130,7 @@ public class GpxTrackImporter extends DefaultHandler implements XMLImporter.Trac
                 trackImporter.newTrack();
                 break;
             case TAG_TRACK_SEGMENT:
-                onTrackSegmentStart();
+                //Nothing to do here.
                 break;
             case TAG_TRACK_POINT:
                 onTrackPointStart(attributes);
@@ -236,9 +236,6 @@ public class GpxTrackImporter extends DefaultHandler implements XMLImporter.Trac
         content = "";
     }
 
-    private void onTrackSegmentStart() {
-    }
-
     private void onTrackSegmentEnd() {
         if (currentSegment.isEmpty()) {
             Log.w(TAG, "No locations in current segment.");

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

@@ -4,10 +4,6 @@ import androidx.annotation.NonNull;
 
 public class ParsingException extends RuntimeException {
 
-    private ParsingException(@NonNull String message) {
-        super(message);
-    }
-
     protected ParsingException(@NonNull String message, Exception cause) {
         super(message, cause);
     }

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

@@ -12,7 +12,6 @@ import java.time.Duration;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.Comparator;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.UUID;
@@ -140,17 +139,14 @@ public class TrackImporter {
             track.setUuid(UUID.randomUUID());
         }
 
-        Collections.sort(trackPoints, new Comparator<TrackPoint>() {
-            @Override
-            public int compare(TrackPoint o1, TrackPoint o2) {
-                if (o1.getTime().isBefore(o2.getTime())) {
-                    return -1;
-                }
-                if (o1.getTime().isAfter(o2.getTime())) {
-                    return 1;
-                }
-                return 0;
+        Collections.sort(trackPoints, (o1, o2) -> {
+            if (o1.getTime().isBefore(o2.getTime())) {
+                return -1;
             }
+            if (o1.getTime().isAfter(o2.getTime())) {
+                return 1;
+            }
+            return 0;
         });
 
         TrackStatisticsUpdater updater = new TrackStatisticsUpdater();