lakitu: Update comments in disk_layout.json

Remove deprecated comments in disk_layout.json, which
is misleading.

BUG=b/186123358
TEST=presbumit
RELEASE_NOTE=None

Change-Id: Id5f3b19529895ecbd5bdd0e9a4bd514468fdefd4
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/15893
Tested-by: Roy Yang <royyang@google.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
1 file changed