Merge "libsnapshot: Don't call RemoveAllSnapshots on normal boot." into main

    LOG(INFO) << "Removing all update state.";

    if (ReadUpdateState(lock) != UpdateState::None) {

        // Only call this if we're actually cancelling an update. It's not

        // expected to yield anything otherwise, and firing up gsid on normal

        // boot is expensive.

        if (!RemoveAllSnapshots(lock)) {

            LOG(ERROR) << "Could not remove all snapshots";

            return false;

        }

    }

    // It's okay if these fail:

    // - For SnapshotBoot and Rollback, first-stage init performs a deeper check after