diff --git a/docs/conf.py b/docs/conf.py
index 6c2a84fbb..511a50039 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -108,8 +108,6 @@
 
 
 def setup(app):
-    app.add_config_value('extension_versions', extension_versions, True)
-
     # The root of the repository.
     basedir = Path(os.path.realpath(__file__)).parents[1]
     # The `LOCALE_DIR` from `config.mk`.