At the top of your dashboard, click the module access icon > Administration > Settings > Manage Course/Batch > Manage Course to open the  Manage Course page. 
Or
At the top of your dashboard, click the module access icon > Administration > Settings > Manage Course/Batch > Manage Batch to open the Manage Batch page.
  1. Select the course. All batches of the selected course are displayed.

  2. Select the batch.

  3. In the top right, click Manage > Assign Tutor to open the Assign Tutor page.



The employee currently assigned as the tutor will be displayed.

  1. Select the department the employee belongs to.

  2. Click Remove beside the employee you want to remove.



For more information, watch this-