* op-wheel: delete dead code

The `ovm-owners` command was only relevant for the migration from legacy
op mainnet to bedrock. Now that bedrock is running in production, we can
delete this code. It reduces code in the codebase that is no longer
necessary to make maintaining easier.

The ability to perform the upgrade is preserved in the legacy codebase,
snapshotted at a point where the migration is reproducible.

See https://github.com/ethereum-optimism/optimism-legacy

* op-wheel: fix build