contract C {
    function f() public pure {
        abi.encode;
        abi.encodePacked;
        abi.encodeWithSelector;
        abi.encodeWithSignature;
        abi.decode;
    }
}
// ----
// Warning: (52-62): Statement has no effect.
// Warning: (72-88): Statement has no effect.
// Warning: (98-120): Statement has no effect.
// Warning: (130-153): Statement has no effect.
// Warning: (163-173): Statement has no effect.