revision_history is removed but still available in the documentation

AUTHORED_RESOURCE.revision_history property was removed in BASE-1.1.0 issue 1.8.0.
but after reading the documentation it appears to be deleted from the table as attibute but still mentioned in it ( Class Description ).
It it still mentioned in :

1. In section { 2.1.3. Revision History }, it says The revision_history attribute defined in the AUTHORED_RESOURCE class is intended to act as a documentary copy of the revision history as known inside the repository, for the benefit of users of the resource.

2. In The class description of AUTHORED_RESOURCE, it is removed from the table as attribute. However, it is used by function current_version(),
   Result = revision_history.most_recent_version

( mentioned in both signature and meaning column of current_version() function)

3. it is mentioned in the class invariants, shouldn't be removed from there?

is there somehting I am not getting here?
Thank you in advance