It means, the sayer (is that a real word?) is saying that what the other person said, or what they acknowledged, or whatever, probably won't interest them.
What is a meaning of this sentence? "It won't be something we would be interested in."
I think, it means "it's nothing, we would be interested in" or they are not interested in what they see or what they feel interest. Anyway, it's a negative sentence.
