Simple mob combat changes. (#22797)

Simple mobs don't dodge backwards anymore, it just doesn't really work
as an engaging mechanic.

To-do:

- [ ] Add armour to a bunch of simple mobs.
- [ ] Maybe make simple mobs attack with actual weapons instead of
magical damage numbers.
- [ ] Fix simplemob movement glide.

Co-authored-by: Matt Atlas <liermattia@gmail.com>

code/modules/holodeck/HolodeckObjects.dm

@@ -481,7 +481,6 @@
 	meat_amount = 0
 	meat_type = null
 	light_range = 2
-	smart_melee = TRUE
 	blood_overlay_icon = null
 	blood_type = null
 

code/modules/mob/living/simple_animal/hostile/giant_spider.dm

@@ -43,7 +43,6 @@
 	pass_flags = PASSTABLE
 	speed = 6
 	mob_size = 6
-	smart_melee = FALSE
 
 	attacktext = "bites"
 	attack_vis_effect = ATTACK_EFFECT_BITE
@@ -112,7 +111,6 @@
 	venom_per_bite = 5
 	speed = 4
 	sample_data = list("Genetic markers identified as being linked with stem cell differentiaton", "Cellular biochemistry shows high metabolic capacity")
-	smart_melee = TRUE
 
 /mob/living/simple_animal/hostile/giant_spider/emp
 	name = "greimorian jackal"
@@ -129,7 +127,6 @@
 	venom_per_bite = 2
 	speed = 5
 	sample_data = list("Genetic markers identified as being linked with stem cell differentiaton", "Cellular biochemistry geared towards creating strong electrical potential differences")
-	smart_melee = TRUE
 
 /mob/living/simple_animal/hostile/giant_spider/bombardier
 	name = "greimorian bombardier"
@@ -148,7 +145,6 @@
 	venom_per_bite = 2
 	speed = 5
 	sample_data = list("Genetic markers identified as being linked with stem cell differentiaton", "Exocrinic acid synthesis detected")
-	smart_melee = TRUE
 
 /mob/living/simple_animal/hostile/giant_spider/bombardier/Shoot(var/target, var/start, var/mob/user, var/bullet = 0)
 	if(target == start)

code/modules/mob/living/simple_animal/hostile/hivebots/hivebot.dm

@@ -30,7 +30,6 @@
 	speed = 4
 	tameable = FALSE
 	flying = TRUE
-	smart_melee = FALSE
 	pass_flags = PASSTABLE|PASSRAILING
 	emote_hear = list("emits a harsh noise")
 	emote_sounds = list(

code/modules/mob/living/simple_animal/hostile/hostile.dm

@@ -37,7 +37,6 @@ ABSTRACT_TYPE(/mob/living/simple_animal/hostile)
 	var/list/tolerated_types = list()
 	var/attack_emote = "stares menacingly at"
 
-	var/smart_melee = TRUE   // This makes melee mobs try to stay two tiles away from their target in combat, lunging in to attack only
 	var/smart_ranged = FALSE // This makes ranged mob check for friendly fire and obstacles
 	var/hostile_nameable = FALSE //If we can rename this hostile mob. Mostly to prevent repeat checks with guard dogs and hostile/retaliate farm animals
 
@@ -278,8 +277,6 @@ ABSTRACT_TYPE(/mob/living/simple_animal/hostile)
 		playsound(loc, attack_sound, 50, 1, 1)
 	if(target)
 		face_atom(target)
-		if(!ranged && smart_melee)
-			addtimer(CALLBACK(src, PROC_REF(PostAttack), target), 1.2 SECONDS, TIMER_STOPPABLE|TIMER_DELETE_ME)
 		return target
 
 /mob/living/simple_animal/hostile/proc/PostAttack(var/atom/target)

code/modules/mob/living/simple_animal/hostile/psirens/psiren.dm

@@ -46,7 +46,6 @@
 	butchering_products = list(/obj/item/reagent_containers/food/snacks/squidmeat/psiren_body_meat = 1)
 
 	attack_vis_effect = ATTACK_EFFECT_DISARM
-	smart_melee = TRUE
 	smart_ranged = FALSE
 
 	/// Messages used by the psiren for its psychic damage effects.

code/modules/mob/living/simple_animal/hostile/space_fauna.dm

@@ -56,7 +56,6 @@
 	flying = TRUE
 	lighting_alpha = LIGHTING_PLANE_ALPHA_SOMEWHAT_INVISIBLE
 
-	smart_melee = FALSE
 	sample_data = list("Cellular structure shows adaptation for survival in vacuum", "Genetic biomarkers identified linked with agressiveness", "Tissue sample contains micro-gas release structures")
 
 /mob/living/simple_animal/hostile/carp/Initialize()

code/modules/mob/living/simple_animal/hostile/viscerator.dm

@@ -27,7 +27,6 @@
 	minbodytemp = 0
 
 	tameable = FALSE
-	smart_melee = FALSE
 
 	flying = TRUE
 	attack_emote = "buzzes at"