diff --git a/functions/_middleware.js b/functions/_middleware.js
deleted file mode 100644
index e5a2d4a9..00000000
--- a/functions/_middleware.js
+++ /dev/null
@@ -1,20 +0,0 @@
-export async function onRequest(context) {
-  const { env, next } = context;
-
-  const IS_DEPRECATED = env.DEPRECATED !== 'false';
-
-  if (IS_DEPRECATED) {
-    return new Response(
-      'This site has been deprecated. Please use main-site.',
-      {
-        status: 410,
-        headers: {
-          'Content-Type': 'text/plain; charset=utf-8',
-          'Cache-Control': 'no-store',
-        },
-      }
-    );
-  }
-
-  return await next();
-}