Turning AI Off
If you don't want AI in your editor, you can switch it off completely. Go to View > Enable AI and unselect it. Phoenix Code asks you to confirm with the Disable AI and Restart button, then restarts right away to apply the change. You are asked to save any unsaved files first.

You can also do this from the AI Settings dialog, with the Enable AI features checkbox.
This turns off everything: the AI tab and panel, the CLI sessions, and the Ask AI buttons in the Live Preview and the editor. To get it back, go to View > Enable AI again and confirm with Enable AI and Restart.
This is a user controlled preference. For schools and workplaces, please refer to AI Control For School And Work.