How check which symbol from project library is not used in project

How check which symbol from project library is not used in project

Hi all,
I need to check how many symbols from my project library are not used in my project and remove them.
The problem is that symbols in my library contain another symbols from my project library. How to check if symbol from library doesn't contain another symbol from library.
Is it possible some how?
Br
Ł.

This is a migrated post! Originally posted on 09.05.2013 by user rrkobra. Please be aware that information can be outdated.