Remove update-via-POST blueprint route

This was originally added in #1733 but has ended up causing some confusion.  You can still use Angular $resource (just make a custom `update` action), and you can also create per-model routes via `'POST /user/:id': { action: 'user/update', model: 'user' }`

lib/hooks/blueprints/index.js

@@ -323,7 +323,6 @@ module.exports = function(sails) {
           _bindRestRoute('get %s/:id', 'findOne');
           _bindRestRoute('post %s', 'create');
           _bindRestRoute('put %s/:id', 'update');
-          _bindRestRoute('post %s/:id', 'update');
           _bindRestRoute('delete %s/:id?', 'destroy');
 
           // Bind "rest" blueprint/shadow routes based on known associations in our model's schema