Revert "Communicate with keymint in the bootloader"

This reverts commit 218bb2ca2b66e646267a56af52acb8e4cc5b0bc9.

Reason for revert: "adb remount && adb reboot" is broken

Change-Id: I4f098f3760ef786f27c7406e756df3e913926e63
6 files changed