Ref https://www.autohotkey.com/boards/viewtopic.php?p=590308#p590308

Please let me know how to turn it off while typing inline. The appearance on hover is okay, but I can't stand the inline "help".

Add
"editor.parameterHints.enabled": false,
to the settings.json file.

Also, I didn't like the pop-up parameter hints on mouse hover. To get rid of those
Add
"editor.hover.enabled": false,
to the settings.json file.