Stock coolers have never been popular among who build their own PCs. They were considered mediocre at best. Since people wouldn't care whether they were in the

Stock coolers have never been popular among who build their own PCs. They were considered mediocre at best. Since people wouldn't care whether they were in the package or not, removing them might have looked like an easy way to increase profit margins. Removing the cooler from their production cycle might have also increased their production throughput.