These methods are being removed from LockPatternUtils because they are
no longer used, so remove them from ShadowLockPatternUtils too.
Bug: 270013005
Change-Id: If196bbef4755c644b3188043ed47e99817bf1856
Merged-In: If196bbef4755c644b3188043ed47e99817bf1856
(cherry picked from commit 795a02c92a
)