Surgery refactors (#18183)

* Remove dead code

* Refactor magic numbers to defines

code/modules/surgery/organs/augments_arms.dm

@@ -51,7 +51,7 @@
 	. = ..()
 
 /obj/item/organ/internal/cyberimp/arm/emag_act()
-	return 0
+	return FALSE
 
 /obj/item/organ/internal/cyberimp/arm/emp_act(severity)
 	if(emp_proof)

code/modules/surgery/organs/blood.dm

@@ -139,16 +139,16 @@
 //Gets blood from mob to a container or other mob, preserving all data in it.
 /mob/living/proc/transfer_blood_to(atom/movable/AM, amount, forced)
 	if(!blood_volume || !AM.reagents)
-		return 0
+		return FALSE
 	if(blood_volume < BLOOD_VOLUME_BAD && !forced)
-		return 0
+		return FALSE
 
 	if(blood_volume < amount)
 		amount = blood_volume
 
 	var/blood_id = get_blood_id()
 	if(!blood_id)
-		return 0
+		return FALSE
 
 	blood_volume -= amount
 

code/modules/surgery/organs/organ_external.dm

@@ -147,9 +147,9 @@
 
 /obj/item/organ/external/attempt_become_organ(obj/item/organ/external/parent,mob/living/carbon/human/H)
 	if(parent_organ != parent.limb_name)
-		return 0
+		return FALSE
 	replaced(H)
-	return 1
+	return TRUE
 
 /****************************************************
 			   DAMAGE PROCS
@@ -666,7 +666,7 @@ Note that amputating the affected organ does in fact remove the infection from t
 	status &= ~ORGAN_INT_BLEEDING
 	perma_injury = 0
 
-/obj/item/organ/external/robotize(company, make_tough = 0, convert_all = 1)
+/obj/item/organ/external/robotize(company, make_tough = FALSE, convert_all = TRUE)
 	..()
 	//robot limbs take reduced damage
 	if(!make_tough)
@@ -781,7 +781,7 @@ Note that amputating the affected organ does in fact remove the infection from t
 	if(isnull(O))
 		O = owner
 	if(!istype(O)) // You're not the primary organ of ANYTHING, bucko
-		return 0
+		return FALSE
 	return src == O.bodyparts_by_name[limb_name]
 
 /obj/item/organ/external/proc/infection_check()

code/modules/surgery/organs/organ_internal.dm

@@ -114,9 +114,9 @@
 
 /obj/item/organ/internal/attempt_become_organ(obj/item/organ/external/parent,mob/living/carbon/human/H)
 	if(parent_organ != parent.limb_name)
-		return 0
+		return FALSE
 	insert(H)
-	return 1
+	return TRUE
 
 // Rendering!
 /obj/item/organ/internal/proc/render()

code/modules/surgery/organs/subtypes/kidan.dm

@@ -61,11 +61,11 @@
 /obj/item/organ/internal/lantern/proc/toggle_biolum(statoverride)
 	if(!statoverride && owner.incapacitated())
 		to_chat(owner, "<span class='warning'>You cannot alter your bioluminescence in your current state.</span>")
-		return 0
+		return FALSE
 
 	if(!statoverride && owner.nutrition < KIDAN_LANTERN_MINHUNGER)
 		to_chat(owner, "<span class='warning'>You're too hungry to be bioluminescent!</span>")
-		return 0
+		return FALSE
 
 	if(!colour)
 		colour = BlendRGB(owner.m_colours["head"], owner.m_colours["body"], 0.65)