How to hide "contingent workers" from filters in Directory

Summary: Need to hide the ability to filter for Contingent Workers in the Organization Chart in Directory

Content (required): Client's need is to hide the item "contingent workers" from the filters available in the Organization Chart in the Directory, because they need the employees not to be able to individuate and distinguish contingent workers from the other employees.

Version (include the version you are using, if applicable): 22A

Code Snippet (add any code snippets that support your topic, if applicable):