[MIRROR] Clears unused research var (#12685)

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

modular_chomp/code/modules/projectiles/ammo_refactor/ammo_magazines.dm

@@ -2,7 +2,6 @@
 /obj/item/ammo_magazine/pistol
 	name = "pistol magazine"
 	icon_state = "m91"
-	origin_tech = list(TECH_COMBAT = 2)
 	mag_type = MAGAZINE
 	matter = list(MAT_STEEL = 600)
 	caliber = "small"
@@ -42,7 +41,6 @@
 	name = "extended pistol magazine"
 	// cringe ammo ban lore begone
 	icon_state = "m93"
-	origin_tech = list(TECH_COMBAT = 2, TECH_ILLEGAL = 1)
 	mag_type = MAGAZINE
 	matter = list(MAT_STEEL = 1000)
 	caliber = "small"

modular_chomp/code/modules/projectiles/clockwork/clockwork_guns_ch.dm

@@ -9,7 +9,6 @@
 	wielded_item_state = "clockrifle-wielded"
 	slot_flags = SLOT_BACK
 	item_icons = list(slot_l_hand_str = 'modular_chomp/icons/mob/items/lefthand_guns_ch.dmi', slot_r_hand_str = 'modular_chomp/icons/mob/items/righthand_guns_ch.dmi', "slot_back" = 'modular_chomp/icons/mob/guns_back_ch.dmi')
-	origin_tech = list(TECH_COMBAT = 4, TECH_MAGNET = 2, TECH_POWER = 4)
 	projectile_type = /obj/item/projectile/bullet/rifle/clockwork
 	w_class = ITEMSIZE_HUGE
 	one_handed_penalty = 90

modular_chomp/code/modules/projectiles/precursor/eclipse.dm

@@ -6,8 +6,6 @@
 	item_state = "cryogun"
 	wielded_item_state = "cryogun-wielded"
 	matter = list(MAT_DURASTEEL = 1000, MAT_MORPHIUM = 500)
-	origin_tech = list(TECH_COMBAT = 6, TECH_POWER = 5, TECH_PRECURSOR = 3)
-
 
 	charge_cost = 80 //How much energy is needed to fire.
 

modular_chomp/code/modules/projectiles/precursor/tyr.dm

@@ -54,7 +54,6 @@
 	icon_state = "shotgun"
 	item_state = "shotgun"
 	wielded_item_state = "placeholder"
-	origin_tech = list(TECH_COMBAT = 6, TECH_POWER = 5, TECH_PRECURSOR = 3)
 
 	charge_cost = 160 //15 shots sort of
 	battery_lock = 1 //No changing