I no longer have a copy of 3.2.1 to check against, but an easy test is “docking.(Whatever) -help | grep fake_native”. If zero show up, it’s gone. If two or more show up, then you need to namespace it properly, so it will be something like (these are guesses) -docking:fake_native to discriminate it from -somethingelse:fake_natve. It’s definitely gone from 3.3 and developer trunk.
I think fake_native was only used for RMSD calculations anyway and can be dropped with no consequence.