cleanup

src/main/java/com/owncloud/android/ui/fragment/FileDetailActivitiesFragment.java

@@ -73,7 +73,6 @@ public class FileDetailActivitiesFragment extends Fragment implements ActivityLi
     private ActivityListAdapter adapter;
     private Unbinder unbinder;
     private OwnCloudClient ownCloudClient;
-    private AsyncTask<String, Object, OCFile> updateTask;
 
     private OCFile file;
     private Account account;

src/main/java/com/owncloud/android/ui/fragment/FileDetailFragment.java

@@ -189,12 +189,12 @@ public class FileDetailFragment extends FileFragment implements OnClickListener
 
             @Override
             public void onTabUnselected(TabLayout.Tab tab) {
-
+                // unused at the moment
             }
 
             @Override
             public void onTabReselected(TabLayout.Tab tab) {
-
+                // unused at the moment
             }
         });
     }