I'd not get rid of any.... As I like some tracks from every genre I can think of.
If I had to get rid of one, it may be Hip Hop... Not because I have anything against the music... but the gang culture that has developed with it is a bit gay. I may be inclined to say Emo as well, simply because of all the twats that like it. The music itself isn't that bad.
Country isn't popular at all in my country so I'm fine with that.