MAINT: consolidate requirements.

Author: rossbar

CONTRIBUTING.md

@@ -26,13 +26,13 @@ See the linked documentation for further details.
 ### Quickstart
 
 Set up a development environment with the dependencies listed in
-`requirements.txt` and `site/requirements.txt`.
+`requirements.txt`.
 For example, using the built-in [`venv`][venv] module:
 
 ```bash
 python -m venv np-tutorials
 source np-tutorials/bin/activate
-python -m pip install -r requirements.txt -r site/requirements.txt
+python -m pip install -r requirements.txt
 ```
 
 [venv]: https://docs.python.org/3/library/venv.html

requirements.txt

@@ -5,5 +5,6 @@ pooch  # for scipy.datasets
 matplotlib
 pandas
 imageio
-# For supporting .md-based notebooks
+# For supporting .md-based notebooks and building the site
 jupytext
+jupyter-book>=2

tox.ini

@@ -17,7 +17,6 @@ deps =
     # We use these files to specify all the dependencies, and below we override
     # versions for specific testing schenarios
     -rtest_requirements.txt
-    -rsite/requirements.txt
     -rrequirements.txt
 
     oldestdeps: numpy==1.24