Revert "For user builds, use a release build id in the description if one exists"

This reverts commit c23d97dee023de953a75cb11ee8434144fee349d.
Revert "For user builds, use a release build id as the incremental if one exists"

This reverts commit 2827e80e5fc5025cc511fdcc5f0866198bd58351.
Revert "kernel: add support for bzImages"

This reverts commit 3929a21da89f11ff44fc5514f99edb9f4fd5199e.