technical skills section on techie cv

pwd

Is this necessary?
I have a list of my experience and main projects on it already where I describe what I have done and how I did it.
Some skills are only mentioned in the technical skills section - like I know some c++ from college even though I didn't use it after graduating or in my final year project.
But I'm not looking for - or likely to get - a C++ job anyway so who cares.

Also
Should you divide your skills into advanced/intermediate/basic? It seems silly because it's a self-assessment, and I think people with very basic skills often overestimate themselves, largely because they haven't found out how much they don't know. I know if I put something down a particular skill as intermediate that there will be plenty of people putting themselves at the same level with more basic skills - yet at the same time I know there's too much more too learn to feel justified calling myself advanced.