Not quite clear enough an explanation.
What about the bravery system do you want to remove? The combat stress mechanic, whereby your gals lose moral each turn until their morale is approximately equal to bravery? That mechanic is pretty central to the mod, along the lines of "If you don't want to deal with it, this mod is probably not your cup of tea." However, you can look for all lines in the ruleset with morale: tag to define morale de-/re-generation on armors and remove them, or create a mini-mod that goes through and sets them systematically to flatHundred: 0. You have your work cut out for you there.
Do you mean all the weapons/items/bonuses that use Bravery? Look for things with powerBonus: and bravery: in the rulesets, and delete the bravery: part. But again, this de-fangs a lot of the mod's interesting content. You'd also have to remove the ability to have gals pilot craft. More work there too.