chore(routes): remove legacy v1/v2/v3 backup folders

These directories were dead code — commented out in routes/index.js
and superseded by the domain-based structure (skydive/cms/ecommerce/herowars).
Also removes the now-pointless commented-out require lines.

src/routes/index.js

@@ -1,7 +1,4 @@
 var routes = require('express').Router();
 routes.use('/api', require('./api'));
-//routes.use('/api/v1', require('./api/v1'));
-//routes.use('/api/v2', require('./api/v2'));
-//routes.use('/api/v3', require('./api/v3'));
 
 module.exports = routes;