diff --git a/dev-docs/source/conf.py b/dev-docs/source/conf.py
index f29eb3dd5f063cc010e7d5e451d3df019505386e..d4dc763ba77ef41f3b20695c7168465c9a661a00 100644
--- a/dev-docs/source/conf.py
+++ b/dev-docs/source/conf.py
@@ -4,7 +4,6 @@
 # serve to show the default.
 
 import os
-from warnings import warn
 
 from sphinx import __version__ as sphinx_version
 import sphinx_bootstrap_theme