[MIRROR] Clears unused research var (#12685)

Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/modules/fireworks/firework_stars.dm

@@ -6,7 +6,6 @@
 	desc = "A very tightly compacted ball of chemicals for use with firework launcher."
 	icon_state = "star"
 	w_class = ITEMSIZE_SMALL
-	origin_tech = list(TECH_MATERIAL = 2, TECH_ENGINEERING = 1)
 
 /obj/item/firework_star/proc/trigger_firework(var/datum/weather_holder/w_holder)
 	return
@@ -16,7 +15,6 @@
 	name = "weather firework star"
 	desc = "A firework star designed to alter a weather, rather than put on a show."
 	var/weather_type
-	origin_tech = list(TECH_MATERIAL = 5, TECH_ENGINEERING = 2)
 
 /obj/item/firework_star/weather/trigger_firework(var/datum/weather_holder/w_holder)
 	if(!w_holder)						// Sanity
@@ -73,14 +71,12 @@
 	name = T_FIREWORK_WEATHER_STAR("HAIL")
 	weather_type = WEATHER_HAIL
 	icon_state = "snow"
-	origin_tech = list(TECH_MATERIAL = 5, TECH_ENGINEERING = 2, TECH_ILLEGAL = 1)
 
 /obj/item/firework_star/weather/fallout
 	name = T_FIREWORK_WEATHER_STAR("NUCLEAR")
 	desc = "This is the worst idea ever."
 	weather_type = WEATHER_FALLOUT_TEMP
 	icon_state = "nuclear"
-	origin_tech = list(TECH_MATERIAL = 7, TECH_ENGINEERING = 3, TECH_ILLEGAL = 5)
 
 /obj/item/firework_star/weather/confetti
 	name = T_FIREWORK_WEATHER_STAR("CONFETTI")

code/modules/fireworks/launcher_construction.dm

@@ -2,7 +2,6 @@
 	name = T_BOARD("firework launcher")
 	board_type = new /datum/frame/frame_types/machine
 	build_path = /obj/machinery/firework_launcher
-	origin_tech = list(TECH_MATERIAL = 4, TECH_ENGINEERING = 2)
 	req_components = list (
 							/obj/item/stock_parts/micro_laser = 2
 	)