Darkness handling update

code/game/gamemodes/devil/imp/imp.dm

@@ -29,7 +29,7 @@
 	melee_damage_lower = 10
 	melee_damage_upper = 15
 	see_in_dark = 8
-	see_invisible = SEE_INVISIBLE_MINIMUM
+	lighting_alpha = LIGHTING_PLANE_ALPHA_MOSTLY_INVISIBLE
 	var/boost
 	var/playstyle_string = "<B><font size=3 color='red'>You are an imp,</font> a mischevious creature from hell. You are the lowest rank on the hellish totem pole  \
 							Though you are not obligated to help, perhaps by aiding a higher ranking devil, you might just get a promotion.  However, you are incapable	\

code/game/gamemodes/devil/true_devil/_true_devil.dm

@@ -30,22 +30,6 @@
 	E.insert()
 	..()
 
-
-/mob/living/carbon/true_devil/update_sight()
-	if(stat == DEAD)
-		sight |= SEE_TURFS
-		sight |= SEE_MOBS
-		sight |= SEE_OBJS
-		see_in_dark = 8
-		see_invisible = SEE_INVISIBLE_LEVEL_TWO
-	else
-		sight = (SEE_TURFS | SEE_OBJS)
-		see_in_dark = 2
-		see_invisible = SEE_INVISIBLE_LIVING
-
-		if(see_override)
-			see_invisible = see_override
-
 // inventory system could use some love
 /mob/living/carbon/true_devil/put_in_hands(obj/item/W)
 	if(!W)