Remove "unit linking" docs and dead code
CLOSED - WONTFIX
Documentation, Pulp 2
The ability to link one unit to another was removed when we converted to mongoengine, because it wasn't being used. The documentation still mentions it though.
This email to pulp-dev@ reported two places where the documentation refers to unit linking:
- referenced_types in 'Type Definitions' -> 'Attributes'
- 'Importers' -> 'Functionality' -> 'Synchronize an External Respository'
References to unit linking should be removed from the documentation.