Removes an unused hud and icons. (tgstation#87327)

## About The Pull Request
Sentient diseases, thieves and space cops are no more. This PR cleans
bites of code and icons that belonged to them.

## Why It's Good For The Game
Leftovers and scraps to removed.

## Changelog
N/A

code/__DEFINES/atom_hud.dm

@@ -35,18 +35,17 @@
 #define DIAG_PATH_HUD "15"
 /// Gland indicators for abductors
 #define GLAND_HUD "16"
-#define SENTIENT_DISEASE_HUD "17"
-#define AI_DETECT_HUD "18"
+#define AI_DETECT_HUD "17"
 /// Displays launchpads' targeting reticle
-#define DIAG_LAUNCHPAD_HUD "19"
+#define DIAG_LAUNCHPAD_HUD "18"
 //for antag huds. these are used at the /mob level
-#define ANTAG_HUD "20"
+#define ANTAG_HUD "19"
 // for fans to identify pins
-#define FAN_HUD "21"
+#define FAN_HUD "20"
 /// Mech camera HUD
-#define DIAG_CAMERA_HUD "22"
+#define DIAG_CAMERA_HUD "21"
 /// Steady Hacked APC effect, visible only to Malf AIs
-#define MALF_APC_HUD "23"
+#define MALF_APC_HUD "22"
 
 //by default everything in the hud_list of an atom is an image
 //a value in hud_list with one of these will change that behavior
@@ -61,10 +60,9 @@
 #define DATA_HUD_DIAGNOSTIC 5
 #define DATA_HUD_BOT_PATH 6
 #define DATA_HUD_ABDUCTOR 7
-#define DATA_HUD_SENTIENT_DISEASE 8
-#define DATA_HUD_AI_DETECT 9
-#define DATA_HUD_FAN 10
-#define DATA_HUD_MALF_APC 11
+#define DATA_HUD_AI_DETECT 8
+#define DATA_HUD_FAN 9
+#define DATA_HUD_MALF_APC 10
 
 /// cooldown for being shown the images for any particular data hud
 #define ADD_HUD_TO_COOLDOWN 20

code/datums/hud.dm

@@ -15,7 +15,6 @@ GLOBAL_LIST_INIT(huds, list(
 	DATA_HUD_DIAGNOSTIC = new /datum/atom_hud/data/diagnostic(),
 	DATA_HUD_BOT_PATH = new /datum/atom_hud/data/bot_path(),
 	DATA_HUD_ABDUCTOR = new /datum/atom_hud/abductor(),
-	DATA_HUD_SENTIENT_DISEASE = new /datum/atom_hud/sentient_disease(),
 	DATA_HUD_AI_DETECT = new /datum/atom_hud/ai_detector(),
 	DATA_HUD_FAN = new /datum/atom_hud/data/human/fan_hud(),
 	DATA_HUD_MALF_APC = new /datum/atom_hud/data/malf_apc(),

code/game/data_huds.dm

@@ -66,9 +66,6 @@
 /datum/atom_hud/abductor
 	hud_icons = list(GLAND_HUD)
 
-/datum/atom_hud/sentient_disease
-	hud_icons = list(SENTIENT_DISEASE_HUD)
-
 /datum/atom_hud/ai_detector
 	hud_icons = list(AI_DETECT_HUD)
 

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

@@ -5,7 +5,7 @@
 	icon = 'icons/mob/human/human.dmi'
 	icon_state = "human_basic"
 	appearance_flags = KEEP_TOGETHER|TILE_BOUND|PIXEL_SCALE|LONG_GLIDE
-	hud_possible = list(HEALTH_HUD,STATUS_HUD,ID_HUD,WANTED_HUD,IMPLOYAL_HUD,IMPSEC_FIRST_HUD,IMPSEC_SECOND_HUD,ANTAG_HUD,GLAND_HUD,SENTIENT_DISEASE_HUD,FAN_HUD)
+	hud_possible = list(HEALTH_HUD,STATUS_HUD,ID_HUD,WANTED_HUD,IMPLOYAL_HUD,IMPSEC_FIRST_HUD,IMPSEC_SECOND_HUD,ANTAG_HUD,GLAND_HUD,FAN_HUD)
 	hud_type = /datum/hud/human
 	pressure_resistance = 25
 	can_buckle = TRUE