Drop plan-moved and sent from the controller seat's events (issue 1943; the review's notes on 1945)

No plan is kept or sent in release 6 (ADR 0539), and the messenger now hears the delivery view's events instead.

go/catalogue/seats.go

@@ -110,10 +110,7 @@ var defaultSeats = append([]Seat{
 			"rolled-back",
 			// A pull request's merge check, judged (novox/hq to-be 45 §9).
 			"checked",
-			// A walk kept in a new state, for the delivery it walks (novox/hq ADR 0239).
-			"plan-moved",
-			// A tier sent to a machine, once the send is kept (novox/hq ADR 0406 §5, issue 974).
-			"sent",
+			// (A walk kept in a new state and a tier sent to a machine are gone with the plans, novox/hq ADR 0539.)
 			// A key of a record mirror written or removed (novox/hq ADR 0289, design 54 §3; design 57 F3).
 			"assignment-changed", "declared-config-changed", "predefined-changed",
 			// A builder's key not taken in because the artifact store does not hold an artifact it names (novox/hq

go/catalogue/verbs_r6_test.go

@@ -113,3 +113,17 @@ func TestTheControllerSaysABucketItDeleted(t *testing.T) {
 		t.Errorf("the controller's seat does not emit bucket-deleted: %v", seat.Emits)
 	}
 }
+
+// 1943 (the review's notes on 1945): the controller's seat no longer says a walk moved or a tier was sent: there is no
+// plan (ADR 0539).
+func TestTheControllerSaysNoPlanEvents(t *testing.T) {
+	seat, ok := SeatNamed(ControllerSeatName)
+	if !ok {
+		t.Fatal("no controller seat")
+	}
+	for _, gone := range []string{"plan-moved", "sent"} {
+		if SeatSays(seat.Emits, gone) {
+			t.Errorf("the controller's seat still emits %s", gone)
+		}
+	}
+}