remove transaction forwarder trait

[mattsse]

Describe the feature

now that we have separate ethapi impls for op and eth, we no longer need this

https://github.com/paradigmxyz/reth/blob/fb6ea8b9249221cbbcc888f393bfc64f9a476d4e/crates/rpc/rpc-eth-api/src/helpers/transaction.rs#L651-L657

TODO

• remove traits and field in EthAPI https://github.com/paradigmxyz/reth/blob/fb6ea8b9249221cbbcc888f393bfc64f9a476d4e/crates/rpc/rpc/src/eth/core.rs#L56-L56
• integrate Sequencerclient in OpEthApi instead https://github.com/paradigmxyz/reth/blob/fb6ea8b9249221cbbcc888f393bfc64f9a476d4e/crates/optimism/node/src/rpc.rs#L34-L38 https://github.com/paradigmxyz/reth/blob/fb6ea8b9249221cbbcc888f393bfc64f9a476d4e/crates/optimism/rpc/src/eth/mod.rs#L43-L43

Additional context

No response

[nkysg]

May I take this?

[EmmanuelAR]

Hello @mattsse

My name is Emmanuel, a software developer from Costa Rica. I would be happy to assist with this task. I will review the current implementation and will guide by the comments that you post in the ticket

Please let me know if this is acceptable.

Best regards, Emmanuel 😁