There is non-trivial chance that once these enter the civilian market (say, via a government auction), there will be a requirement for the buyer to add the emissions control components back.
There is a 100% chance that either they will never enter the civilian market, or the deleted emissions parts will be un-deleted.
They will never be street legal in the USA (non DOT-approved), emissions controls or no.
When people buy these things they normally never leave the farm.
Vehicles over 25 years old are approved, no emissions requirement.
(Though some states are stopping it)
They usually have to remove the weapon systems and electronic counter-measures. usually.