Google has eliminated the following structured information fields from its Google Search assistance documentation. Google stated these were removed “since they are unused by Google Search and Rich Result Test does not flag warnings for them.”Here are the structured information fields that were removed: Under HowTo: description.
Under QAPage:, mainEntity.dateCreated, mainEntity.suggestedAnswer.dateCreated,, mainEntity.acceptedAnswer.dateCreated, and
Under SpecialAnnouncement: company, audience, serviceType, address, and category.Keep this in mind if you are using any of these fields. You do not need to eliminate them, it is simply that Google Search and Rich Result Test wont utilize them.Forum discussion at Twitter.