The highway code says;
'Use of cycle lanes is not compulsory and will depend on your experience and skills, but they can make your journey safer.'
This, imo, indicates that the authorities who install cycle lanes are doing so in an attempt to improve safety for cyclists. The fact that numerous studies have shown that cycle lanes can increase the number of incidents involving cyclists, particularly at junctions, suggests that cycle lanes are not always useful for this purpose.
Sure paint doesn't kill cyclists, but many cyclists do faithfully stick to cycle lanes regardless of road or traffic conditions. This encourages bad practices such as gutter hugging, riding in the door zone, abruptly pulling out when the cycle lane is obstructed, and perhaps most deadly of all filtering down the left side of traffic at junctions without first assessing if it is actually safe to do so. It has also been shown that motorists give less room to cyclists when there are painted cycle lanes which is a danger in itself.
Yes removing cycle lanes won't solve the problem of incompetent cyclists, that requires education to make them more road aware, but surely it doesn't make sense to paint cycle lanes where most experienced cyclists would agree it is obviously unsafe to ride? (thankfully it seems most of the idiotic 'cycle round the left of the roundabout' ones seem to be dying out...)