Comment 28 for bug 1968154

So I did some more digging, and I guess the 5.15.0-82 kernel is there because it's required by linux-image-generic:

$ dpkg -l | grep linux-image | grep ^ii
ii linux-image-5.15.0-82-generic 5.15.0-82.91 amd64 Signed kernel image generic
ii linux-image-5.19.0-50-generic 5.19.0-50.50 amd64 Signed kernel image generic
ii linux-image-6.2.0-26-generic 6.2.0-26.26~22.04.1 amd64 Signed kernel image generic
ii linux-image-6.2.0-31-generic 6.2.0-31.31~22.04.1 amd64 Signed kernel image generic
ii linux-image-generic 5.15.0.82.78 amd64 Generic Linux kernel image
ii linux-image-generic-hwe-22.04 6.2.0.31.31~22.04.8

Although even after uninstalling linux-image-generic, sudo apt autoremove still doesn't remove any additional kernels. I guess somehow the logic that apt uses to remove unused kernels doesn't account for when multiple linux-image-generic packages are installed because of HWE.