This reverts commit 4e2f9c1.

- Also use the Table of contents message from the TOC schema to signal
  what content it is when there are no headings to show in edit.
- Rollback default showing of Table of contents h2 since it would be breaking
  change as opposed to how it works now.

…efaultTocRender ToC templates

- Since the fallback would never resolve to true there is no point in referencing them
  instead we show Table of contents if there are no headings to show

…sages

- I want to avoid getting rid of the i18n translated strings and keep CI happy