In magnolia 3.0.2, we removed metadata from the "expression" nodetype definition. (MAGNOLIA-1320)
However, if using an existing repository, the metadata are still used, since the actual nodetype definition is used is in repositories/magnolia/repository/nodetypes/custom_nodetypes.xml
Changing the definition there results in warnings.

So there are actually 2 things to do :

• make it possible to actually update existing nodetype definitions
• have an update task (i.e with the update mechanism we should introduce in 3.1 - is this on Jira already ?) that will actively remove metadata from existing expression nodes, when updating a workspace created prior to 3.0.2