You can delete a link using a link context menu.

JavaScript

gantt.contextMenuLink = new DayPilot.Menu({items: [
  {text:"Show link ID", onclick: function() { alert("Link ID: " + this.source.data.id);} },
  {text:"Delete link", onclick: function() { dp.links.remove(this.source);} }
]});

Availability

Availability of this feature in DayPilot editions:

LitePro
DayPilot for JavaScript
DayPilot for ASP.NET WebForms
DayPilot for ASP.NET MVC
DayPilot for Java