With this change the following optimisations are done to improve speed and reduce size of the schema generation:

* Abstract nodetypes are not queried anymore for constraints as they
are already resolved by the nodetype manager.

* Entries in the inheritance map and constraints will be skipped if they don’t contain any data.

These optimisations reduce the size of the schema in the Neos.Demo from ~380KB to ~307KB and improve the response time by ~20%.

The more nodetypes a project has, the bigger the benefit is.

… nodetype anymore