Update tutorials-index to only show the getting started page

Author: emiliom

ohw23/tutorials-index/index.md

@@ -4,11 +4,4 @@
 :maxdepth: 1
 
 ../tutorials_getting_started
-../tutorials/00-Mon/xarray-in-45-min.ipynb
-data-access-in-python
-data-access-in-r
-data-vis-in-python
-machine-learning-applications
-espanol/index
-../tutorials/optional/managing-conda-envs/README.md
 ```