Whether or not a pacifist can fire a gun is no longer based on the gun being harmful, but the chambered round being harmful (#36670)

fix: makes dragnet non harmful
tweak: pacifists can now use any disabler or stun setting on any energy gun
code: removed all of the pacifism check code from code/modules/mob/living/living.dm
code: gun objects no longer have a harmful variable, instead, ammo_casing objects now have a harmful variable, which is by default set to TRUE
code: if a pacifist fires a gun, it checks whether or not the round chambered is lethal, instead of whether or not the gun itself is lethal.

code/modules/projectiles/guns/ballistic/toy.dm

@@ -13,7 +13,6 @@
 	clumsy_check = 0
 	item_flags = NONE
 	casing_ejector = FALSE
-	harmful = FALSE
 
 /obj/item/gun/ballistic/automatic/toy/unrestricted
 	pin = /obj/item/device/firing_pin
@@ -28,7 +27,6 @@
 	burst_size = 1
 	fire_delay = 0
 	actions_types = list()
-	harmful = FALSE
 
 /obj/item/gun/ballistic/automatic/toy/pistol/update_icon()
 	..()
@@ -58,7 +56,6 @@
 	item_flags = NONE
 	casing_ejector = FALSE
 	can_suppress = FALSE
-	harmful = FALSE
 
 /obj/item/gun/ballistic/shotgun/toy/process_chamber(empty_chamber = 0)
 	..()