* op-chain-ops: delete dead code

This commit includes the deletion of a bunch of dead code
after https://github.com/ethereum-optimism/optimism/pull/10106
has been merged. There is no need to maintain a bunch of custom
go code to generate the L2 genesis anymore, all of that is handled
directly in solidity.

* op-chain-ops: delete more dead code

* op-chain-ops: more cleanup

* cleanup: remove old references

* op-chain-ops: cleanup abstractions
Co-authored-by: refcell <abigger87@gmail.com>

---------
Co-authored-by: refcell <abigger87@gmail.com>