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This function was only used in the SQLite Channel ID store; a migration
away from it was added in April. This change removes the use of the
function which until now is only used for migrating old Channel ID db
formats to the new format. With this change, old databases won't be
upgradeable.

Bug: 618026
Change-Id: I245077dd1cb16cb5a53b174a15d7dbdf0e0e9942
Reviewed-on: https://chromium-review.googlesource.com/669866
Commit-Queue: Nick Harper <nharper@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/master@{#502966}