Personally I wrote a script that does that and one that removes the suprhero units. But that would have to be implemented on every map. You'd have to go into the mod or game and remove those units, structures, and command buttons. Not impossible but I'd think not worth the effort.
Well you could just open up the commandsets of the dozers/workers for each side and comment out the Build_CommandButton SW. Hell there are only 12 factions, one ";" a piece. You could do that in like 2 mins.