Problem/Motivation
In #2429191: Deprecate entity_reference.module and move its functionality to core we deprecated the entity reference module but this was before most of was written. This issue is going to explore:
- Properly deprecating all the module code
- How to deprecate a module
The aim is to ensure that we can safely remove this module and explore whether we should add a generic deprecated key to info.yml.
There are probably going to be issues with tests that are very generic and install all the available modules so we'll need to deal with the consequences.
Proposed resolution
Remaining tasks
User interface changes
tbd
API changes
tbd
Data model changes
None
Release notes snippet
tbd