For developers: Delete departments
To delete a department, you must perform the following:
    - Get an instance of the manager.
    Get an instance of the TaxonomyManager object.   
    - Get the specified department.
    Get an instance of the department. For more information, read For developers: Query departments.   
    - Mark the department for deletion.
    To mark the department to be deleted, call the Delete method of the manager and pass the department as an argument.   
    - Save the changes.
    To delete the department, save the changes to the manager. 
NOTE: To delete multiple departments, query them and execute the code below for each one of them.
NOTE: If you try to delete a department that has child departments, the child departments will also get deleted. 
Use the following code sample: