Don't re-export MainSplitContentType enum (#34021)

* Don't re-export MainSplitContentType enum

I don't see why this was necessary, importing RoomView pulls in all sort
of stuff, whereas RoomContext is much smaller.

* ts, not tsx

* unintentional change

apps/web/src/components/structures/RoomView.tsx

@@ -207,8 +207,6 @@ interface IRoomProps extends RoomViewProps {
     enableReadReceiptsAndMarkersOnActivity?: boolean;
 }
 
-export { MainSplitContentType };
-
 export interface IRoomState {
     room?: Room;
     roomId?: string;

apps/web/src/components/views/rooms/RoomHeader/RoomHeader.tsx

@@ -49,7 +49,7 @@ import { CallGuestLinkButton } from "./CallGuestLinkButton.tsx";
 import { type ButtonEvent } from "../../elements/AccessibleButton.tsx";
 import WithPresenceIndicator, { useDmMember } from "../../avatars/WithPresenceIndicator.tsx";
 import { type IOOBData } from "../../../../stores/ThreepidInviteStore.ts";
-import { MainSplitContentType } from "../../../structures/RoomView.tsx";
+import { MainSplitContentType } from "../../../../contexts/RoomContext.ts";
 import defaultDispatcher from "../../../../dispatcher/dispatcher.ts";
 import { RoomSettingsTab } from "../../dialogs/RoomSettingsDialog.tsx";
 import { useScopedRoomContext } from "../../../../contexts/ScopedRoomContext.tsx";