#3987 remove alabaster-specific sidebars

as default sphinx-quickstart settings

sphinx/templates/quickstart/conf.py_t

@@ -114,11 +114,8 @@ html_static_path = ['{{ dot }}static']
 # refs: http://alabaster.readthedocs.io/en/latest/installation.html#sidebars
 html_sidebars = {
     '**': [
-        'about.html',
-        'navigation.html',
         'relations.html',  # needs 'show_related': True theme option to display
         'searchbox.html',
-        'donate.html',
     ]
 }