evm_signer::TryProcessOutTx err variable doesnt need to be declared here, as it will be created here and is not used before that. So the following code is also useless. So I suggest to remove those.
https://github.com/code-423n4/2023-11-zetachain/blob/main/repos/node/zetaclient/evm_signer.go#L351-L354
