remove unused code

lib/src/core/engine.dart

@@ -13,7 +13,6 @@ import '../extensions.dart';
 import '../internal/events.dart';
 import '../internal/types.dart';
 import '../logger.dart';
-import '../managers/delay.dart';
 import '../managers/event.dart';
 import '../options.dart';
 import '../proto/livekit_models.pb.dart' as lk_models;
@@ -71,8 +70,6 @@ class Engine extends Disposable with EventsEmittable<EngineEvent> {
 
   late final _signalListener = signalClient.createListener(synchronized: true);
 
-  final delays = CancelableDelayManager();
-
   Engine({
     SignalClient? signalClient,
     PeerConnectionCreate? peerConnectionCreate,
@@ -90,7 +87,6 @@ class Engine extends Disposable with EventsEmittable<EngineEvent> {
     onDispose(() async {
       await cleanUp();
       await events.dispose();
-      await delays.dispose();
       await _signalListener.dispose();
     });
   }
@@ -141,9 +137,6 @@ class Engine extends Disposable with EventsEmittable<EngineEvent> {
   Future<void> cleanUp() async {
     logger.fine('[${objectId}] cleanUp()');
 
-    // cancel all ongoing delays
-    await delays.cancelAll();
-
     await publisher?.dispose();
     publisher = null;
 

lib/src/core/room.dart

@@ -517,4 +517,4 @@ extension RoomDebugMethods on Room {
       serverLeave: serverLeave,
     );
   }
-}
+}

lib/src/managers/delay.dart

@@ -1,45 +0,0 @@
-import 'package:async/async.dart';
-
-import '../support/disposable.dart';
-
-class CancelableDelayManager extends Disposable {
-  //
-  final _delays = <CancelableOperation<void>>[];
-
-  CancelableDelayManager() {
-    onDispose(() async => await cancelAll());
-  }
-  // delay but cancelable
-  Future<void> waitFor(
-    Duration wait, {
-    Function? ifNotCancelled,
-  }) async {
-    final op = CancelableOperation<void>.fromFuture(
-      Future<void>.delayed(wait),
-    );
-    _delays.add(op);
-    await op.valueOrCancellation();
-    _delays.remove(op);
-    // if it was cancelled we probably don't want to execute it
-    if (!op.isCanceled) ifNotCancelled?.call();
-  }
-
-  // @override
-  // Future<bool> dispose() async {
-  //   final didDispose = await super.dispose();
-  //   if (didDispose) {
-  //     await cancelAll();
-  //   }
-  //   return didDispose;
-  // }
-
-  Future<void> cancelAll() async {
-    // cancel all delays
-    if (_delays.isEmpty) return;
-    // make a copy so we don't mutate while iterating
-    final snapshot = List<CancelableOperation<void>>.from(_delays);
-    for (final op in snapshot) {
-      await op.cancel();
-    }
-  }
-}