added extensions, removed code i do not understand

docs/conf.py

@@ -35,7 +35,7 @@ html_sidebars = juliadoc.default_sidebars()
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = []
+#extensions = []
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']