There is a /page/html/{title}/ public endpoint in RESTBase that was supposed to return all the revisions/tid pairs stored in RESTBase. Given that we intend to store only a single revision/tid for content in RESTBase, the listing makes not sense anymore and can be deleted.

Alon with the listing, we need to remove listing endpoints from key_value, key_rev_value and multicontent_bucket and modify the tests that use listings.