Deprecate API v2 (#7761)

* deprecate api-v2

* remove v2 test helpers

* remove unused string

website/server/middlewares/v2.js

@@ -0,0 +1,19 @@
+// API v2 middlewares and routes
+// DEPRECATED AND INACTIVE
+
+import express from 'express';
+import nconf from 'nconf';
+import {
+  NotFound,
+} from '../libs/errors';
+
+const router = express.Router(); // eslint-disable-line babel/new-cap
+
+const BASE_URL = nconf.get('BASE_URL');
+
+router.all('*', function deprecatedV2 (req, res, next) {
+  let error = new NotFound(`API v2 is no longer supported, please use API v3 instead (${BASE_URL}/apidoc).`);
+  return next(error);
+});
+
+module.exports = router;