Discussed in D2846
Pointed by @Feldfeld, agoge is weaker than silver shield tech, cuz + 10% training time (old values).
Pointed by @Nescio, silver shields were veteran soldiers on battlefields, so attack makes more sense than armor. This should also help to keep agoge/spartan a little stronger than mace_champion_infantry_e.
Patch removes armor and increases attack by 10%.
See also D2867