Delete the push and the declaration: the send stub and node holds, link declare and its order, the sent readers, and the sweep judged by compositions (release 6, issue 1945 B8)

internal/link/receive.go

@@ -121,15 +121,3 @@ type Inbound interface {
 	// Close lets go of whatever the implementation holds.
 	Close()
 }
-
-// Outstanding answers which declaration the mesh last sent a node — the digest, not the
-// declaration.
-//
-// **Asked before the store is waited on** (design 25 §3): a report about a declaration the mesh
-// has already moved past is not worth holding a slot in the window that a current message needs.
-// It is a separate interface from Listener rather than a method on it, because a controller that
-// only publishes needs neither and something that records reports need not also be able to say
-// what was sent.
-type Outstanding interface {
-	Outstanding(ctx context.Context, node string) (string, error)
-}