delete method

@override Future<void> delete(String key)

Delete from local storage

Implementation

@override
/// Delete from local storage
Future<void> delete(String key) async {
  final db = await _initializedDB;
  final txn = db.transaction(storeName, idbModeReadWrite);
  await txn.objectStore(storeName).delete(key);
  await txn.completed;
}