Snowdin and caves fluff and zoning removal (#95770)

## About The Pull Request

<img width="245" height="468" alt="image"
src="https://github.com/user-attachments/assets/e7924766-cf9a-4ca0-b3fb-a668d3d2cec0"
/>

## Why It's Good For The Game

shouldve been removed with the first pr

## Changelog

Removes everything for the caves and snowdin away missions except for
the original caves area because i used that in heretic, whoops.

not player facing there should be no CL

code/modules/mob/living/basic/vermin/space_bat.dm

@@ -53,10 +53,3 @@
 		/datum/ai_planning_subtree/target_retaliate,
 		/datum/ai_planning_subtree/basic_melee_attack_subtree,
 	)
-
-///Subtype used in the caves away mission
-/mob/living/basic/bat/away_caves
-	name = "cave bat"
-	desc = "A rare breed of bat which roosts deep in caves."
-	minimum_survivable_temperature = 0
-	gold_core_spawnable = NO_SPAWN