How nullify civ bonuses (scenario editor)?

i want to make a custom civ just to see how it fairs in the scenario editor, but i dont know how to take out old civ bonuses in order for me to do so. I know that enabling all-techs in a single player game would do that, but that applies to all players.

if there isnt a way to do this in the scenario editor, is there a civ which all of its bonuses can be reversed using triggers?