Completely tears out all uses of the 'update_icon' var in mobs

code/modules/mob/living/carbon/alien/humanoid/humanoid.dm

@@ -9,7 +9,6 @@
 	var/next_attack = 0
 	var/pounce_cooldown = 0
 	var/pounce_cooldown_time = 30
-	update_icon = 1
 	var/leap_on_click = 0
 	var/custom_pixel_x_offset = 0 //for admin fuckery.
 	var/custom_pixel_y_offset = 0

code/modules/mob/living/carbon/slime/slime.dm

@@ -12,7 +12,6 @@
 	health = 150
 	gender = NEUTER
 
-	update_icon = 0
 	nutrition = 700
 
 	see_in_dark = 8

code/modules/mob/mob_defines.dm

@@ -199,8 +199,6 @@
 
 	mouse_drag_pointer = MOUSE_ACTIVE_POINTER
 
-	var/update_icon = 1 //Set to 1 to trigger update_icons() at the next life() call
-
 	var/status_flags = CANSTUN|CANWEAKEN|CANPARALYSE|CANPUSH	//bitflags defining which status effects can be inflicted (replaces canweaken, canstun, etc)
 
 	var/area/lastarea = null

code/modules/projectiles/projectile/special.dm

@@ -94,8 +94,7 @@
 			M.bodytemperature = temperature
 			if(temperature > 500)//emagged
 				M.adjust_fire_stacks(0.5)
-				M.on_fire = 1
-				M.update_icon = 1
+				M.IgniteMob()
 				playsound(M.loc, 'sound/effects/bamf.ogg', 50, 0)
 		return 1