It is generated by yarn build, and listed in the .gitignore file in this package,
presumably it was added by mistake

fixup! feat(contracts): only burn gas in enqueue for high l2 gas limits

This code is no longer required with the new fee scheme.
Delete it from the monorepo.

There is no need to query for the chain id over and over again
when syncing from L2 using the DTL. This also reduces the amount
of logs for the `docker-compose` setup and will save requests to
the sequencer in production.