Remove sessionId, pageId pairs from whitelist
Per https://meta.wikimedia.org/wiki/Discovery/Data_access_guidelines we should not retain "articles browsers by readers in granular form after 90 days" so we either need to remove sessionIds or pageids from schemas that are whitelisting both. There should be few schemas affected by this change if any at all, let's verify.
Individual gerrit changes need to be created per schema if there are any changes needed so schema owners can review them. The popup schema already has its own ticket (T207670).