diff --git a/mkdocs.insiders.yml b/mkdocs.insiders.yml
index b81aa5d87c..0e74f401ea 100644
--- a/mkdocs.insiders.yml
+++ b/mkdocs.insiders.yml
@@ -36,6 +36,3 @@ markdown_extensions:
       targets:
         include:
           - '*'
-
-extra_css:
-  - 'extra/tweaks.css'