Cleaned up species code, remove naked requirement

code/modules/mob/living/carbon/human/species/shadow.dm

@@ -12,7 +12,6 @@
 
 	blood_color = "#CCCCCC"
 	flesh_color = "#AAAAAA"
-	butt = "plasma"
 	has_organ = list(
 		"brain" = /obj/item/organ/brain
 		)

code/modules/mob/living/carbon/human/species/species.dm

@@ -78,7 +78,6 @@
 	//Used in icon caching.
 	var/race_key = 0
 	var/icon/icon_template
-	var/butt = "human"//Determines which image to use for copier
 	var/is_small
 	var/show_ssd = 1
 	var/virus_immune

code/modules/mob/living/carbon/human/species/station.dm

@@ -53,7 +53,6 @@
 	heat_level_3_breathe = 1100 //Default 1000
 
 	flesh_color = "#34AF10"
-	butt = "unathi"
 	reagent_tag = PROCESS_ORG
 	base_color = "#066000"
 
@@ -98,7 +97,6 @@
 	clothing_flags = HAS_UNDERWEAR | HAS_UNDERSHIRT | HAS_SOCKS
 	bodyflags = FEET_PADDED | HAS_TAIL | HAS_SKIN_COLOR | TAIL_WAGGING
 	dietflags = DIET_OMNI
-	butt = "tajaran"
 	reagent_tag = PROCESS_ORG
 	flesh_color = "#AFA59E"
 	base_color = "#333333"
@@ -134,7 +132,6 @@
 	clothing_flags = HAS_UNDERWEAR | HAS_UNDERSHIRT | HAS_SOCKS
 	bodyflags = FEET_PADDED | HAS_TAIL | HAS_SKIN_COLOR | TAIL_WAGGING
 	dietflags = DIET_OMNI
-	butt = "vulp"
 	reagent_tag = PROCESS_ORG
 	flesh_color = "#966464"
 	base_color = "#BE8264"
@@ -163,7 +160,6 @@
 	clothing_flags = HAS_UNDERWEAR | HAS_UNDERSHIRT | HAS_SOCKS
 	bodyflags = HAS_SKIN_COLOR
 	dietflags = DIET_HERB
-	butt = "skrell"
 	flesh_color = "#8CD7A3"
 	blood_color = "#1D2CBF"
 	reagent_tag = PROCESS_ORG
@@ -179,7 +175,6 @@
 	language = "Vox-pidgin"
 	speech_sounds = list('sound/voice/shriek1.ogg')
 	speech_chance = 20
-	butt = "vox"
 	unarmed_type = /datum/unarmed_attack/claws	//I dont think it will hurt to give vox claws too.
 
 	blurb = "The Vox are the broken remnants of a once-proud race, now reduced to little more than \
@@ -309,7 +304,6 @@
 	clothing_flags = HAS_SOCKS
 	bodyflags = FEET_CLAWS
 	dietflags = DIET_HERB
-	butt = "kidan"
 	blood_color = "#FB9800"
 	reagent_tag = PROCESS_ORG
 
@@ -328,7 +322,6 @@
 	bodyflags = HAS_SKIN_COLOR
 	bloodflags = BLOOD_SLIME
 	dietflags = DIET_CARN
-	butt = "slime"
 	reagent_tag = PROCESS_ORG
 	//ventcrawler = 1 //ventcrawling commented out
 
@@ -355,7 +348,6 @@
 	flags = IS_WHITELISTED | HAS_LIPS | CAN_BE_FAT
 	clothing_flags = HAS_UNDERWEAR | HAS_UNDERSHIRT | HAS_SOCKS
 	dietflags = DIET_HERB
-	butt = "grey"
 	reagent_tag = PROCESS_ORG
 	blood_color = "#A200FF"
 
@@ -408,7 +400,6 @@
 	dietflags = 0		//Diona regenerate nutrition in light, no diet necessary
 
 	body_temperature = T0C + 15		//make the plant people have a bit lower body temperature, why not
-	butt = "diona"
 	blood_color = "#004400"
 	flesh_color = "#907E4A"
 
@@ -503,7 +494,6 @@
 	clothing_flags = HAS_SOCKS
 	bodyflags = HAS_SKIN_COLOR
 	dietflags = 0		//IPCs can't eat, so no diet
-	butt = "machine"
 	blood_color = "#1F181F"
 	flesh_color = "#AAAAAA"
 	virus_immune = 1