We dropped the middle of the day feed not long past your DD's age. If she isn't asking, I would say there's no need to offer.

As Kaz says, the WHO recommends bfing until two years of age and then for as long as mother and child want it. Different children wean at different ages. At no point does breastmilk stop being good. Actually, the immunological benefits are just packed into the remaining bfs, once she isn't feeding often. My DD kept having her two bfs a day until 3 1/2 and then her final one for another 6 mths, so she might not give up those last two feeds for a while!