Merge pull request #19268 from charris/backport-19264

DOC: fix duplicate navbar in development documentation index

Author: charris

doc/source/dev/index.rst

@@ -4,23 +4,6 @@
 Contributing to NumPy
 #####################
 
-.. TODO: this is hidden because there's a bug in the pydata theme that won't render TOC items under headers
-
-.. toctree::
-   :hidden:
-
-   Git Basics <gitwash/index>
-   development_environment
-   development_gitpod
-   development_workflow
-   development_advanced_debugging
-   ../benchmarking
-   NumPy C style guide <https://numpy.org/neps/nep-0045-c_style_guide.html>
-   releasing
-   governance/index
-   howto-docs
-
-
 Not a coder? Not a problem! NumPy is multi-faceted, and we can use a lot of help.
 These are all activities we'd like to get help with (they're all important, so
 we list them in alphabetical order):

environment.yml

@@ -21,7 +21,7 @@ dependencies:
   - mypy=0.812
   - typing_extensions
   # For building docs
-  - sphinx=3.5.4
+  - sphinx=4.0.1
   - numpydoc=1.1.0
   - ipython
   - scipy