delete method

@override Future<void> delete(String key)

Deletes the key from the keychain

Implementation

@override
Future<void> delete(String key) async {
  _checkInitialized();
  int? expiry = expirations.remove(key);
  expiry ??= -1;
  deleted.broadcast(
    ExpirationEvent(
      key,
      expiry,
    ),
  );
  await persist();
}