clean_grand_wedding_betrothal_variables

clean_grand_wedding_betrothal_variables = {
	scope:spouse_1 ?= { remove_variable ?= promised_grand_wedding_by } # in case the countdown expired during activity
	scope:spouse_2 ?= { remove_variable ?= promised_grand_wedding_by }
	var:promised_grand_wedding_marriage_countdown ?= {
		remove_variable ?= promised_grand_wedding_by
		betrothed ?= { remove_variable ?= promised_grand_wedding_by }
	}
	if = {
		limit = { exists = var:promised_grand_wedding_marriage_countdown }
		remove_variable = promised_grand_wedding_marriage_countdown
	}
	if = {
		limit = { exists = var:promised_grand_wedding_to }
		remove_variable = promised_grand_wedding_to
	}
}

As written in game/common/scripted_effects/04_dlc_ep2_wedding_effects.txt.