They were deprecated in 1803.
For a few moments I thought you were being sarcastic about the fact that Software Restriction was deprecated ages ago by mentioning a date two hundred years in the past.
Then I realised it's a Windows 10 version number.
Edit: For reference, 1803 was released in 2018 https://en.wikipedia.org/wiki/Windows_10_version_history#Ver...
They were deprecated in 1803.