further reqs changes for rtd testing

Author: robertjwilson

docs/requirements.txt

@@ -1,21 +1,9 @@
-sphinx==4.0.2
-#sphinx
+
+sphinx>=3.0.3
 numpydoc==0.9.2
-#ipykernel==5.1.2
-ipykernel
-nbsphinx>=0.8.6
-Pygments
-sphinx_rtd_theme==0.5.2
-#docutils<0.17
-docutils
+ipykernel==5.1.2
+sphinx_rtd_theme==0.4.3
 widgetsnbextension
 ipywidgets
-xarray
-hvplot
-netCDF4
-ncplot
-numpy
-plotnine
-dill
-sphinx-book-theme
-
+pandas
+docutils<0.17