Removes a site from the claimed list, the writer choosePrimary shares. The primary is never removed here: the caller refuses it first, and a document that names a primary outside its own claimed list is not one this writes.
choosePrimary
the document as written, or undefined when the binding cannot be written
Removes a site from the claimed list, the writer
choosePrimaryshares. The primary is never removed here: the caller refuses it first, and a document that names a primary outside its own claimed list is not one this writes.