Revert "Deprecate API v2" (#7801)

website/server/middlewares/domain.js

@@ -1,13 +0,0 @@
-import domainMiddleware from 'domain-middleware';
-
-module.exports = function implementDomainMiddleware (server, mongoose) {
-  return domainMiddleware({
-    server: {
-      close () {
-        server.close();
-        mongoose.connection.close();
-      },
-    },
-    killTimeout: 10000,
-  });
-};