There are absolutely bike lanes that are not heavily used. But the correct response is to analyze why they're not being used, instead of saying, "Let's rip them out!" It turns out that a strip of a paint on an otherwise busy road doesn't make people feel safe and make them want to bike.
Kind of depends on the bike lanes, too. In my city a lot of "bike lanes" basically just had you riding in the gutter with the trash, right next to speeding cars. Not very helpful.
