Is it installed or Licensed? All the products are installed. Do you mean how to unlicensed a product? Has it been licensed for awhile or did you just accidently license it and you want to unlicensed it?
Please do not make the 'Licensed' and 'Installed' mixed up. They DO NOT mean the same thing.
How to Disable An Oracle EBS Licensed Product (Doc ID 2484329.1)
Understanding and Managing Licensing Options in Oracle E-Business Suite (Doc ID 1639705.1)
You cannot unlicensed a product, it is not supported. That said, if you just licensed it and realized it before you regenerated form or have done anything else to the instance there is a note on how to fix it. I'll post it when I find it.
As mentioned, Please go through