Source
It seems that not only Pokemon but many, many, many moves are gone.
The thing is it seems when you can actually import Pokemon via Home from past games they actually have the move still, but the description straight up says it can't be used and recommends to delete it.
This isn't just Let's Go moves (though they're gone) but key moves like Pursuit, Return, and Hidden Power.
It seems that not only Pokemon but many, many, many moves are gone.
The thing is it seems when you can actually import Pokemon via Home from past games they actually have the move still, but the description straight up says it can't be used and recommends to delete it.
This isn't just Let's Go moves (though they're gone) but key moves like Pursuit, Return, and Hidden Power.