Entries marked as removed should appear in the Removed category

There appear to be at least 3 entries that have been removed but which do not appear in the [`Removed`](//api.jquery.com/category/removed/) section of the API: [`deferred.isRejected()`](//api.jquery.com/deferred.isRejected/), [`deferred.isResolved()`](//api.jquery.com/deferred.isResolved/), and [`.selector`](//api.jquery.com/selector/). They appear to be missing the proper category slug.