Update conda env and conf.py for clean build

docs/source/conf.py

@@ -139,10 +139,7 @@ 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
 # documentation.
-html_theme_options = {
-    'collapse_navigation': False,
-    'display_version': False,
-}
+#html_theme_options = {}
 
 # Add any paths that contain custom themes here, relative to this directory.
 #html_theme_path = []