diff --git a/docs2/source/conf.py b/docs2/source/conf.py
index 1f7a4af6..24f9e898 100644
--- a/docs2/source/conf.py
+++ b/docs2/source/conf.py
@@ -25,8 +25,6 @@ extensions = [
     "sphinx.ext.viewcode",
     "sphinx.ext.autodoc",
     "sphinx.ext.ifconfig",
-    "sphinx-prompt",
-    "sphinx_substitution_extensions",
 ]
 
 rst_prolog = f"""