We maintain a single VS Code setting that allows you to opt out of the AI features provided in VS Code: "chat.disableAIFeatures" (see also: https://code.visualstudio.com/updates/v1_104#_hide-and-disab...). If you can still find AI features appearing after you have configured this setting, then please report an issue at https://github.com/microsoft/vscode and we are happy to take a look.
It is possible that from time to time a new AI related feature slips in that does not respect that setting, but we try our best to push fixes as soon as possible.
Thanks! Ben (VS Code Team)