i quit my job, and my boss is now getting back to me with this vague threat(?) AIO?

the restaurant i wait for part-time is relocating. it's a 1 1/2 hour drive and a 20minute uphill climb to the restaurant.

i emailed my boss yesterday morning that i wouldn't be coming into work anymore and citing that the commute is just something i cannot align my schedule with (i have problems sleeping, so i don't get a lotta hours in before my 12h shifts anyway, and this would cut any sleep i can get shorter AGAIN).

he responded with the email above, and i cant help but feel like he's trying to intimidate me into coming in tomorrow. AIO??? this feels weird to me.