Some improvements suggested by Codacy

app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.java

@@ -78,14 +78,6 @@ public class MessageDetailFragment extends Fragment {
      */
     private Plaintext item;
 
-
-    /**
-     * Mandatory empty constructor for the fragment manager to instantiate the
-     * fragment (e.g. upon screen orientation changes).
-     */
-    public MessageDetailFragment() {
-    }
-
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);