Remove the 'TABLE OF CONTENTS' header

Its tricked a number of readers, as its not a TOC, its just local to the
current topic. Now that the docs are not mobile responsive its not an
active UI element either.

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Merge pull request #6284 from SvenDowideit/remove-table-of-contents-eyebrow

Remove the 'TABLE OF CONTENTS' header