Revert "upgrade to unity 2021.3.16f1"

Assets/Lib/Scripts/Data/Augmentation.cs

Assets/Lib/Scripts/Data/Experiment.cs

Assets/Lib/Scripts/Data/Iteration.cs

Assets/Lib/Scripts/Data/Occlusion.cs

Assets/Lib/Scripts/GameManager.cs

Assets/Lib/Scripts/Manager.cs

Assets/Lib/Scripts/Network/Client.cs

Assets/Lib/Scripts/Network/NetworkManager.cs

Assets/Manager.prefab

...ts/MixedRealityToolkit.Generated/ProjectPreferences.asset

Assets/Resources/VuforiaConfiguration.asset

Assets/Scenes/MainScene.unity

Assets/Sphere 1.prefab

Assets/Sphere 1.prefab.meta

Assets/StreamingAssets/log.txt

Assets/XR/Settings/Open XR Package Settings.asset

...Information_DoNotShip/Plugins/ARM/lib_burst_generated.txt

...formation_DoNotShip/Plugins/ARM64/lib_burst_generated.txt

...Information_DoNotShip/Plugins/x64/lib_burst_generated.txt

...Information_DoNotShip/Plugins/x86/lib_burst_generated.txt