You can easily delete the task assignment from the Gantt Chart.
Follow these steps:
- Go to the Gantt Chart and select the Project from the list,
- You see all the Task Assignments related to the Project that you selected,
- Right-click on the Task Assignment to see the quick options like Edit Task, Quick Assign and Delete Task options.
- Click the Delete Task option and delete the Task Assignment
- You can also click on the Task assignment and click the "Delete" button to delete the task assignment.