am 6c8b80ac: Merge "Removing three obsolete lessons from TOC, which in turn removes them from building-userinfo.jd when built." into lmp-docs

* commit '6c8b80acbb456b5b537137a181dc2ad4cbd07adc':
  Removing three obsolete lessons from TOC, which in turn removes them from building-userinfo.jd when built.