* contracts-bedrock: deprecate deployments

There is no reason to keep the legacy hardhat deploy artifacts
around anymore. It just adds complexity to the codebase. With the
advent of the superchain, it no longer makes sense to hold on to
these artifacts here. The contract addressses now live in the superchain-registry.
The legacy abis live in git history or release tags.

For what its worth, the `deployments` directory is already out of date
and the superchat registry should be considered the source of truth.

Deleting these files will reduce the size of a cloned repo.

The entire `deployments` directory is not yet fully removed because
it is used to write the `.deploy` artifact after the forge deployment
script runs. This will also change in the future but do not want to
make too large of changes at once.

The `.deploy` file will be configurable where it is written to
and it will interoperate well with the `superchain-registry` repo.

* sdk: remove imports of deploy artifacts

* chain-mon: remove dead import