can't understand this line code in BLSAccount.sol

[sunvim]

function _validateSignature(
        UserOperation calldata userOp,
        bytes32 userOpHash
    ) internal view override returns (uint256 validationData) {
        (userOp, userOpHash);
        if (userOp.initCode.length != 0) {
            // BLSSignatureAggregator.getUserOpPublicKey() assumes that during account creation, the public key is
            // the suffix of the initCode.
            // The account MUST validate it
            bytes32 pubKeyHash = keccak256(abi.encode(getBlsPublicKey()));
            require(
                keccak256(userOp.initCode[userOp.initCode.length - 128:]) ==
                    pubKeyHash,
                "wrong pubkey"
            );
        }

        return _packValidationData(ValidationData(aggregator, 0, 0));
    }

this line code : (userOp, userOpHash); what mean ? who can help me that confuse?

[leekt]

I think it is a legacy code that was used to silence the warning for "not used local variable"

[sunvim]

thank you help me, I am happy to get the check from expert!