MSC4140: drop delayed state interference tests (#845)

Don't test that a user's delayed state events are cancelled by a more recent
state event from a different user.  That behaviour [has been delegated to
an "alternative"]
(matrix-org/matrix-spec-proposals@3efecea)
in the delayed event MSC4140 for some time now, and may be removed from
Synapse ([Synapse PR](element-hq/synapse#19495))

Author: AndrewFerr

tests/msc4140/delayed_event_test.go

@@ -360,85 +360,6 @@ func TestDelayedEvents(t *testing.T) {
 		})
 	})
 
-	t.Run("delayed state is not cancelled by new state from the same user", func(t *testing.T) {
-		var res *http.Response
-
-		stateKey := "to_not_be_cancelled_by_same_user"
-
-		defer cleanupDelayedEvents(t, user)
-
-		setterKey := "setter"
-		setterExpected := "on_timeout"
-		user.MustDo(
-			t,
-			"PUT",
-			getPathForState(roomID, eventType, stateKey),
-			client.WithJSONBody(t, map[string]interface{}{
-				setterKey: setterExpected,
-			}),
-			getDelayQueryParam("900"),
-		)
-		matchDelayedEvents(t, user, delayedEventsNumberEqual(1))
-
-		user.MustDo(
-			t,
-			"PUT",
-			getPathForState(roomID, eventType, stateKey),
-			client.WithJSONBody(t, map[string]interface{}{
-				setterKey: "manual",
-			}),
-		)
-		matchDelayedEvents(t, user, delayedEventsNumberEqual(1))
-
-		time.Sleep(1 * time.Second)
-		res = user.MustDo(t, "GET", getPathForState(roomID, eventType, stateKey))
-		must.MatchResponse(t, res, match.HTTPResponse{
-			JSON: []match.JSON{
-				match.JSONKeyEqual(setterKey, setterExpected),
-			},
-		})
-	})
-
-	t.Run("delayed state is cancelled by new state from another user", func(t *testing.T) {
-		var res *http.Response
-
-		stateKey := "to_be_cancelled_by_other_user"
-
-		defer cleanupDelayedEvents(t, user)
-		defer cleanupDelayedEvents(t, user2)
-
-		setterKey := "setter"
-		user.MustDo(
-			t,
-			"PUT",
-			getPathForState(roomID, eventType, stateKey),
-			client.WithJSONBody(t, map[string]interface{}{
-				setterKey: "on_timeout",
-			}),
-			getDelayQueryParam("900"),
-		)
-		matchDelayedEvents(t, user, delayedEventsNumberEqual(1))
-
-		setterExpected := "manual"
-		user2.MustDo(
-			t,
-			"PUT",
-			getPathForState(roomID, eventType, stateKey),
-			client.WithJSONBody(t, map[string]interface{}{
-				setterKey: setterExpected,
-			}),
-		)
-		matchDelayedEvents(t, user, delayedEventsNumberEqual(0))
-
-		time.Sleep(1 * time.Second)
-		res = user.MustDo(t, "GET", getPathForState(roomID, eventType, stateKey))
-		must.MatchResponse(t, res, match.HTTPResponse{
-			JSON: []match.JSON{
-				match.JSONKeyEqual(setterKey, setterExpected),
-			},
-		})
-	})
-
 	t.Run("delayed state events are kept on server restart", func(t *testing.T) {
 		// Spec cannot enforce server restart behaviour
 		runtime.SkipIf(t, runtime.Dendrite, runtime.Conduit, runtime.Conduwuit)