delete method
Implementation
Future<bool> delete(String key, {String? subKey}) {
key = _convertMd5(key);
if (null != subKey) subKey = _convertMd5(subKey);
return _getCacheFutureResult(
_memoryCacheStore,
_diskCacheStore,
_memoryCacheStore?.delete(key, subKey: subKey),
_diskCacheStore?.delete(key, subKey: subKey));
}