documentation: reverting makefile and sdp toc depth

Author: Talia Chopra

doc/Makefile

@@ -3,7 +3,7 @@
 
 # You can set these variables from the command line.
 SPHINXOPTS    = -W
-SPHINXBUILD   = python3 -msphinx 
+SPHINXBUILD   = python -msphinx 
 SPHINXPROJ    = sagemaker
 SOURCEDIR     = .
 BUILDDIR      = _build

doc/api/training/smd_data_parallel.rst

@@ -66,7 +66,7 @@ model.
 
 
 .. toctree::
-   :maxdepth: 5
+   :maxdepth: 2
 
    sdp_versions/smd_data_parallel_pytorch
    sdp_versions/smd_data_parallel_tensorflow