Merge "Remove static _book.yaml in favor of generated version (samples_navtree_data.cs)." into mnc-mr-docs am: 2974e94 am: 1c1a85bc
am: 61a6d2f

* commit '61a6d2f359e3ae81e7f962ba9fc02e0a92ceb300':
  Remove static _book.yaml in favor of generated version (samples_navtree_data.cs).

Change-Id: I9086d484fc307a7c1e39a06c317383d7b2e9c7be