Leave the page title to the page

The call and the lobby each set `document.title`, so a component
embedded in a host renamed the host's tab to "Element Call | <room>".
The title belongs to whoever owns the page: the standalone app's
RoomPage now sets it, for whichever room it has got as far as knowing
about, and the call itself no longer touches it.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/room/GroupCallView.tsx

@@ -57,7 +57,6 @@ import {
   type CallEventSounds,
 } from "./CallEventAudioRenderer";
 import { useLatest } from "../useLatest";
-import { usePageTitle } from "../usePageTitle";
 import {
   ConnectionLostError,
   E2EENotSupportedError,
@@ -208,7 +207,6 @@ export const GroupCallView: FC<Props> = ({
     if (passwordFromUrl) saveKeyForRoom(room.roomId, passwordFromUrl);
   }, [passwordFromUrl, room.roomId]);
 
-  usePageTitle(roomName);
   useAppBarTitle(roomName);
 
   const matrixInfo = useMemo((): MatrixInfo => {