Remove SELECTED_TRACK type from TrackDataHub.

MyTracks/src/com/google/android/apps/mytracks/fragments/ChartFragment.java

@@ -155,11 +155,6 @@ public class ChartFragment extends Fragment implements TrackDataListener {
     layout.removeView(chartView);
   }
 
-  @Override
-  public void onSelectedTrackChanged(Track track) {
-    // We don't care.
-  }
-
   @Override
   public void onTrackUpdated(Track track) {
     if (isResumed()) {

MyTracks/src/com/google/android/apps/mytracks/fragments/MyTracksMapFragment.java

@@ -375,12 +375,7 @@ public class MyTracksMapFragment extends SupportMapFragment implements TrackData
     }
     return true;
   }
-  
-  @Override
-  public void onSelectedTrackChanged(final Track track) {
-    // We don't care.
-  }
-  
+
   @Override
   public void onTrackUpdated(Track track) {
     currentTrack = track;

MyTracks/src/com/google/android/apps/mytracks/fragments/StatsFragment.java

@@ -100,11 +100,6 @@ public class StatsFragment extends Fragment implements TrackDataListener {
     handler.removeCallbacks(updateTotalTime);
   }
 
-  @Override
-  public void onSelectedTrackChanged(Track track) {
-    // We don't care.
-  }
-
   @Override
   public void onTrackUpdated(final Track track) {
     if (isResumed()) {