repair: Stop parsing VPD cache

Companion change to:
https://chromium-review.googlesource.com/c/infra/infra/+/5185328

`vpd -g ...` is enough to retrieve this value. We're going to remove the
dump_vpd_log cache eventually.

BUG=b:77594752
TEST=none

Change-Id: Ie70c392f24a68ec7200725ee41cf38af11e38571
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/moblab/+/5191666
Reviewed-by: Varun Thammineni <varunth@google.com>
Commit-Queue: Varun Thammineni <varunth@google.com>
Tested-by: Varun Thammineni <varunth@google.com>
1 file changed