We let our youngest "crack out" on binkies the last few months. We have pictures of her with 2 and 3 binks in her mouth. The only thing you can replace a binky with is your attention. If I were you, I would allow it until she's 3, in bed and in the car. Start "losing" it a lot in the last month, but the time when she asks for "more" is not the time to abruptly take it away. Take away the bedtime one first, and the car one last. You have to replace it with something and redirect her to those things over and over and over. But she'll get it.
I want to add that there are a lot of things I am very adamant about when it comes to discipline regarding things like manners, cleaning, language, moral issues, general misbehavior, etc... But self comfort is not something I discipline. I tend toward finding alternative comforts. It's not wrong to self soothe, and ripping this object of comfort away from some children can be traumatic for them. It doesn't matter that they are little and get over it, their feelings need to be respected. It's not "giving in" to show a child how to find alternative methods of controlling and redirecting emotional impulses. You know your child best, I suggest you just follow the path that is most direct and will cause the least amount of trauma.