remove DocVersion related

docs/conf.py

@@ -4,7 +4,7 @@ from __future__ import print_function
 import inspect
 import re
 
-from pallets_sphinx_themes import DocVersion, ProjectLink, get_version
+from pallets_sphinx_themes import ProjectLink, get_version
 
 # Project --------------------------------------------------------------
 
@@ -47,11 +47,6 @@ html_context = {
         ProjectLink(
             'Issue Tracker', 'https://github.com/pallets/flask/issues/'),
     ],
-    'versions': [
-        DocVersion('dev', 'Development', 'unstable'),
-        DocVersion('1.0', 'Flask 1.0', 'stable'),
-        DocVersion('0.12', 'Flask 0.12'),
-    ],
     'canonical_url': 'http://flask.pocoo.org/docs/{}/'.format(version),
     'carbon_ads_args': 'zoneid=1673&serve=C6AILKT&placement=pocooorg',
 }