CHROMIUM: verity: remove stale code/comments from earlier bitmap design

TBR=wad(already LGTMed and submitted to kernel.git)
BUG=9752
TEST= Ran dm-verity.git unit tests. Ran platform_DMVerityCorruption on H/W.

Change-Id: I6a7f4c21e6bb5a6afd9590fafc1f9b1f93a25700
Signed-off-by: Mandeep Singh Baines <msb@chromium.org>

kernel.git Review URL: http://codereview.chromium.org/6250155

Review URL: http://codereview.chromium.org/6628022
2 files changed