David,
I contacted support and I received an answer:
This email is regarding the Intel RSTe version you are trying to uninstall in Intel Core Server 2012 R2.
After doing some research in the database I found out that there is no way to remove the software since the Programs and Features option is missing in that operating system.
What I can recommend is contacting Microsoft* in order to check if they have a way to properly uninstall applications in Windows* Core Sever.
It is unacceptable that Intel (a major player on the technology world) offer this kind of half baked solutions. Core is the Microsoft default installation for Windows Server 2012, the fact that you do not offer a full set of features will keep make customer unhappy.