[dev_setup] remove codegen as we don't use it anymore
[dev_setup] remove codegen as we don't use it anymore

aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core