code: function removeScopedHandler (event, handler) {
      let scopedHandler;
  
      for (let i = 0, len = handlers[event].length; i < len; i++) {
          let handlerGroup = handlers[event][i];
  
          if (handler === handler.original) {
              scopedHandler = handler.scoped;
              handlers[event].splice(i, 1);
          }
      }
  
      return scopedHandler || handler;
  }
docs: [removeScopedHandler description]
  @method removeScopedHandler
  @param  {String}   event   [description]
  @param  {Function} handler [description]
  @return {Function}         Returns the scoped handler or original if scope was not passed on `add`