You must have full administrative permissions in your space to perform these steps.
This document will explain how a KB Group Admin can hide topic breadcrumbs from view on their KB Live Site(s). This guide explains how to remove them from the entire KB space or from a single KB document.
Topic Breadcrumbs are the links at the top of the page that display the topic paths that lead to the document you are looking at.
Example of Topic Breadcrumbs: