Ignore web-ui resources on default routing split

https://github.com/nuxeo/nuxeo-platform-document-routing/blob/master/nuxeo-routing-default/etc/update.sh

Currently, the above script splits default-routing studio template into server and jsf ui bundles.

The studio template/project may be use for learning and onboarding and should have web UI layouts as well.

Problem
If any web Ui resources (like layouts) are added they will end up in the server bundle.

Proposed solution
Update the script to remove all `ui` resources from the current created bundles.

Note
The final solution (not in this scope) will be to create a new split for web UI.