As part of migration of legacy schemas to Modern Event Platform, WikipediaPortal was identified as one that will need to be deprecated. Its instrumentation is located in wikimedia/portals repository.
Since the data collected through that instrumentation is not used anywhere nor by anyone (and has not been for quite some time), it is time for that old instrumentation to be completely removed.
(And probably the associated tables in event and event_sanitized databases in Hadoop/Hive to be dropped as well.)