I don't know, because there is very little detail about what this attack is and how it works. It looks like they managed to thwart whatever protections exist in the USB DCI (Direct Connect Interface)[1] which is a debugging system for Intel chips.
If they have full debugger access to what's running in Intel ME then removing the code from the firmware probably doesn't make a difference (assuming they can run un-trusted code in that context). If they cannot write their own code and so an attack requires ROP gadgets then removing the code might make it harder (or impossible) to do, but I doubt it.
If they have full debugger access to what's running in Intel ME then removing the code from the firmware probably doesn't make a difference (assuming they can run un-trusted code in that context). If they cannot write their own code and so an attack requires ROP gadgets then removing the code might make it harder (or impossible) to do, but I doubt it.
[1]: http://www2.lauterbach.com/pdf/directory.pdf#M8.newlink.DIR6...