Remove two unused methods in BlockLayoutEncoder. Using these methods to compute block offsets instead of the block layout info could lead to some confusion. Change-Id: Iaa3b91bdb517632107923076e3ece7efeab278c2 Reviewed-on: https://chromium-review.googlesource.com/321250 Tryjob-Request: Jamie Madill <jmadill@chromium.org> Reviewed-by: Alexis Hétu <sugoi@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>