Remove CallFeed export

src/matrix.ts

@@ -54,11 +54,6 @@ export {
     CallType,
 } from "./webrtc/call";
 
-// TODO: This export is temporary and is only used for the local call feed for conference calls
-// Ideally conference calls will become a first-class concept and we will have a local call feed with
-// a lifecycle that matches the conference call, not individual calls to members.
-export { CallFeed } from "./webrtc/callFeed";
-
 // expose the underlying request object so different environments can use
 // different request libs (e.g. request or browser-request)
 let requestInstance;