How to delete and update dependency in Gantt?

How can I delete and update a dependency in Gantt?...  What actions should I take?..  i don't see buttons (for delete) or forms (for edit)

Also... this is correct for the Gantt's functionality?

<div id="URLEliminarDependencia" data-request-url="@Url.Action("EliminarDependencia", "EventoProgramadoes", new { IdCronograma = ViewData["IdCronograma"] })"></div>

var dependenciesDataSource = new kendo.data.GanttDependencyDataSource({
        transport: {
            read: {
                url: $('#URLObtenerDependencias').data('request-url'),
                dataType: "jsonp"
            },
            update: {
                url: $('#URLActualizarDependencia').data('request-url'),
                dataType: "jsonp"
            },
            destroy: {
                url: $('#URLEliminarDependencia').data('request-url'),
                dataType: "jsonp"
            },
            create: {
                url: $('#URLCrearDependencia').data('request-url'),
                dataType: "jsonp"
            },
            parameterMap: function (options, operation) {
                if (operation !== "read") {
                    return { models: kendo.stringify(options.models || [options]) };
                }
            }
        },

Controller:

     public JsonResult EliminarDependencia(int IdCronograma)
        {
            var models = this.DeserializeObject<IEnumerable<GanttDependencyModel>>("models").ToList();

            ---more code---
            return this.Jsonp(models);
        }