delete method

@override Future<void> delete(String key)

Implementation

@override
Future<void> delete(String key) async {
  var changed = false;
  final file = await _recordFile(key);
  if (await file.exists()) {
    await file.delete();
    changed = true;
  }
  final legacy = _legacyFile(key);
  if (legacy != null && await legacy.exists()) {
    await legacy.delete();
    changed = true;
  }
  if (changed) notifyListeners(key);
}