Removed unused class.

src/rosjava_actionlib/rosjava_actionlib/src/main/java/com/github/ekumen/rosjava_actionlib/GoalTrigger.java

-/**
- * Copyright (c) 2015, Ernesto Corbellini, Ekumen
- *
- * Based on actionlib code by Stuart Glaser, Willow Garage
- *
- * Pending license.
- *
- */
-
-
-package com.github.ekumen.rosjava_actionlib;
-
-/*
- * Interface class to represent the triggering actions for a goal.
- */
-public class GoalTrigger
-{
-  public void sendGoal()
-  {
-  }
-
-  public void cancelGoal()
-  {
-  }
-}