Leave them alone. Programs sometimes require specific versions of the C++ libraries and will install them as necessary. I'll give you some simple rules to live by:
1. If you don't know what it is, don't touch it.
2. If you don't know enough about it to be able to teach it to someone else, don't touch it.
3. When in doubt, refer to rules 1 & 2.
Your system will thank you.