java: remove unnecessary constructor declarations

in the absence of any other constructors, the compiler will automatically
generate a public no-arg constructor

Change-Id: I70eca507cd8e16e33580b3398d41d70690bc2909

odk/examples/java/NotesAccess/NotesAccess.java

@@ -125,11 +125,6 @@ public class NotesAccess implements Runnable {
         thread.start();
     }
 
-    /** This is the default constructor without arguments.
-     */
-    public NotesAccess() {
-    }
-
     /** Reading all documents from the given database and writing the data to
      * an OpenOffice.org Calc spreadsheet document.
      */