I'd like to know what that has to do with unused code. Perhaps your senior can explain that.
A code redundancy check utility is just a generic utility that does a ... code reduncancy check on a file. It's not actually checking the "code". It is typically used to check for dropped bits in a tranmission or to check for unexpected changes to files. For example, sometimes when you download a file from the net a CRC value is provided. After you get the file you can run this utility on the file you just got and verify you get the same CRC. If you do, then you know the file is OK. Like I said, I have no idea what that has to do with unused code.