Knockoutjs :undefined is not an object (evaluating 'this.list.remove')?

Why i can't remove items of the array?

The html view here i am trying to display all objects of the array Edit here every time you click at the tag i want to remove an element of the array. but it is not working Delete

  the script   
    $(function () {
       var customers=[
          {name:'robert'},
          {name:'miguel'},
          {name:'felipe'},
          {name:'juan'},
          {name:'danilo'},
          {name:'federico'}
         ];

         var viewModel = {

            self:this,

            list: ko.observableArray(customers),

           its not removing the item of the array.
            removeItem: function(place) {
                this.list.remove(place);
            }
         };
    ko.applyBindings(viewModel);
    });