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

* commit '2974e94e41844cc8ecfb039f70c2040428dd73bd':
  Remove static _book.yaml in favor of generated version (samples_navtree_data.cs).

Change-Id: I0f6ca21b301215b5816eea9ec420830a21cac3d3