fixup MediaView tests

src/tile/MediaView.test.tsx

@@ -19,11 +19,7 @@ import { type ComponentProps } from "react";
 
 import { MediaView } from "./MediaView";
 import { EncryptionStatus } from "../state/MediaViewModel";
-import {
-  mockLocalParticipant,
-  mockMatrixRoomMember,
-  mockRtcMembership,
-} from "../utils/test";
+import { mockLocalParticipant } from "../utils/test";
 
 describe("MediaView", () => {
   const participant = mockLocalParticipant({});
@@ -49,10 +45,7 @@ describe("MediaView", () => {
     mirror: false,
     unencryptedWarning: false,
     video: trackReference,
-    member: mockMatrixRoomMember(
-      mockRtcMembership("@alice:example.org", "CCCC"),
-      { name: "some name" },
-    ),
+    member: undefined,
     localParticipant: false,
     focusable: true,
   };