Merge branch 'master' into jlin27_tutorials_refresh

Author: Jessica Lin

index.rst

@@ -278,14 +278,6 @@ Parallel and Distributed Training
 .. -----------------------------------------
 .. Page TOC
 .. -----------------------------------------
-.. toctree::
-   :maxdepth: 2
-   :hidden:
-   :includehidden:
-   :caption: Recipes
-
-   recipes/recipes_index
-
 .. toctree::
    :maxdepth: 2
    :hidden: