Hello A.,
Well, I just took my daughter to the dentist for her first visit when she was 2 1/2. She, like your daughter, only had the pacifier at sleeping times - never during the day. It stayed in her crib or bed once she went to a big girl bed.
I was surprised when the dentist asked me if she used a pacifier or sucked her thumb. When I told her yes, she said that it was already doing some damage to her bite. I was quite surprised. She went on to explain that it's not HOW MUCH the kiddos use the pacifier, it's HOW HARD they suck on it when they do. Apparently, my daughter really sucked on it quite hard. Who knew? The damage is reversible at this point, but I immediately went home and cut all the pacifiers and when my daughter discovered them in her bed, they were "broken." She was kind of sad, and had trouble falling asleep for a few days - she also had trouble when she would wake in the night and not have that to soothe her back to sleep. In a short time, she did just fine, and I am glad she no longer has it.
I was going to get rid of it around the time she was 15-18 months, and wish I had! The transition would have been far easier, I believe. In my opinion, due to the fact your daughter is not super attached to it, I'd get rid of it. By cutting the pacifiers (the suck part), and leaving them in the bed, it was "no one's fault." She couldn't blame me for taking them away.
There are lots of ideas to say "bye bye" to the pacifiers, but I needed to do it as quickly as possible. Find what works for you, but know that your little one may be doing damage already due to how hard she sucks on it, not necessarily how much she uses it.
Good luck -