Remove deprecated codes (#225)
* 🛠️refactor(autoload): remove async-task Functions.php from composer.json
* ⚙️chore(cache) remove deprecated method `CacheManager::get()`
* 🛠️refactor(encryption) refactor encrypt and decrypt functions
* Remove deprecated functions
* ⚙️chore(pipeline) delete Hub.php file
* 🛠️refactor(helpers) remove deprecated functions from autoload in composer.json
* ⚙️chore(dependencies) remove unused http-client functions in composer.json
* ⚙️chore(dependencies) remove unused files
* Remove deprecated functions
* Format
* ⚙️chore(dependencies) update composer/composer to v2.0 in composer.json
---------
Co-authored-by: Deeka Wong <8337659+huangdijia@users.noreply.github.com>