use classic css instead of custom

docs/conf.py

@@ -155,12 +155,12 @@
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ["static"]
+# html_static_path = ["static"]
 
 # custom CSS files
-html_context = {
-    "css_files": ["_static/css/custom.css"],
-}
+# html_context = {
+#    "css_files": ["_static/css/custom.css"],
+# }
 
 # Add any extra paths that contain custom files (such as robots.txt or
 # .htaccess) here, relative to this directory. These files are copied