Revert more integrity check changes.

The integrity checking features never shipped as part of a release.
Delete the stale code.

This conceptually reverts the following commits:

  * c7d64c134ae786cc41af78a3e7dfbfeda8be4287
  * ee2b49283261f7b4518ec7c98f568f883f817c9d

Test: Device boots and no obvious problems.
Change-Id: I8d1589b38ddbcdf26f5132476b8cdfba7ef439cd
4 files changed