update Sphinx config

Author: weaverba137

doc/conf.py

@@ -35,6 +35,7 @@
     'sphinx.ext.mathjax',
     'sphinx.ext.viewcode',
     'sphinx.ext.napoleon',
+    'sphinx_rtd_theme',
     'sphinx_toolbox.collapse'  # pip install sphinx-toolbox
 ]
 
@@ -133,12 +134,7 @@
 # a list of builtin themes.
 #html_theme = 'default'
 #html_theme = 'haiku'
-try:
-    import sphinx_rtd_theme
-    html_theme = 'sphinx_rtd_theme'
-    html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
-except ImportError:
-    pass
+html_theme = 'sphinx_rtd_theme'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the