Revert "Add temporary endpoint to check language headers (#33154)" (#33159)

middleware/index.js

@@ -234,14 +234,6 @@ export default function (app) {
   app.get('/_ip', instrument(remoteIP, './remoteIP'))
   app.get('/_build', instrument(buildInfo, './buildInfo'))
 
-  // TEMPORARY towards 33028
-  app.get('/headers.json', (req, res) => {
-    res.set('cache-control', 'private, no-store').json({
-      'accept-language': req.get('accept-language'),
-      'x-user-language': req.get('x-user-language'),
-    })
-  })
-
   // Check for a dropped connection before proceeding (again)
   app.use(haltOnDroppedConnection)