dont do anything if the fragment gets hidden

app/src/main/java/com/simplemobiletools/gallery/adapters/MyPagerAdapter.java

@@ -33,10 +33,6 @@ public class MyPagerAdapter extends FragmentStatePagerAdapter {
 
     @Override
     public Fragment getItem(int position) {
-        if (fragment != null) {
-            fragment.fragmentHidden();
-        }
-
         final Medium medium = media.get(position);
         final Bundle bundle = new Bundle();
         bundle.putSerializable(Constants.MEDIUM, medium);

app/src/main/java/com/simplemobiletools/gallery/fragments/PhotoFragment.java

@@ -8,9 +8,9 @@ import android.view.ViewGroup;
 import com.davemorrissey.labs.subscaleview.ImageSource;
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView;
 import com.simplemobiletools.gallery.Constants;
-import com.simplemobiletools.gallery.models.Medium;
 import com.simplemobiletools.gallery.R;
 import com.simplemobiletools.gallery.activities.ViewPagerActivity;
+import com.simplemobiletools.gallery.models.Medium;
 
 public class PhotoFragment extends ViewPagerFragment implements View.OnClickListener {
 
@@ -45,9 +45,4 @@ public class PhotoFragment extends ViewPagerFragment implements View.OnClickList
     public void itemDragged() {
 
     }
-
-    @Override
-    public void fragmentHidden() {
-
-    }
 }

app/src/main/java/com/simplemobiletools/gallery/fragments/VideoFragment.java

@@ -77,10 +77,6 @@ public class VideoFragment extends ViewPagerFragment
         pauseVideo();
     }
 
-    public void fragmentHidden() {
-        cleanup();
-    }
-
     private void initTimeHolder(View view) {
         RelativeLayout timeHolder = (RelativeLayout) view.findViewById(R.id.video_time_holder);
         final Resources res = getResources();

app/src/main/java/com/simplemobiletools/gallery/fragments/ViewPagerFragment.java

@@ -4,6 +4,4 @@ import android.support.v4.app.Fragment;
 
 public abstract class ViewPagerFragment extends Fragment {
     public abstract void itemDragged();
-
-    public abstract void fragmentHidden();
 }