documentation pages at https://docs.ceph.com

I'm trying to clean up the CephFS Landing Page: https://docs.ceph.com/docs/master/cephfs/ I want to do away with the section named "Using CephFS" and relocate those links if required to the left hand side pane/frame which has expandable Table of Contents. I haven't found any .rst file under the ceph source directory (doc/) listing out the Table of Contents. So, the question is, where is the Table of Contents stored or how is the Table of Contents generated and managed ? Any hints to get the task at hand done will be appreciated as well. -- Milind