I'm with @Helen3 on this one~ You got a discount and it's not a big deal for you. BUT, I would suggest that you mention to the host that the listing description states 'breakfast provided' and if "Breakfast is not included" is the norm, the host should update the listing description accordingly. Also, @Kirill7, you could add that you are fine with no breakfast provided but would like to know if the host provides any type of complimentary beverages such as coffee/tea/bottled water or snacks.
FYI - I do not provide any meals to my guests, but I have a small self-serve area where I leave out corn flakes, tea, coffee, instant cup soup, instant noodles, and an assortment of snacks (cookies, crackers, candy) for guests as well as a couple soft drinks and juice on the guest shelf in the fridge.