Originally Posted by xpi0t0s
Just remove it from the project. Then instead of a "missing library" error you may or may not get any "missing symbols" errors. If you get no missing symbols then the library wasn't needed. If you do get missing symbols then you can Google them instead and find out what library they are defined in.
Reading this I'm dead sure you are a very experienced programmer.
Thanks for the answer it helped me a lot.