Revert #25303 and subsequent fixes (#25613)

* Revert "Be safe, radios. (#25595)"

This reverts commit bfa88abd5a.

* Revert "Fixes various radio issues (#25586)"

This reverts commit 9296564ab6.

* Revert "refactors radios to use proximity (#25303)"

This reverts commit 06db6bc004.

* One more bit that needed reverting.

* Begone, unnecessary file!

---------

Co-authored-by: FunnyMan3595 (Charlie Nolan) <funnyman@google.com>

code/modules/client/preference/link_processing.dm

@@ -1048,9 +1048,6 @@
 
 				if("ghost_radio")
 					toggles ^= PREFTOGGLE_CHAT_GHOSTRADIO
-					if(isobserver(user))
-						var/mob/dead/observer/dead_dude = user
-						dead_dude.update_dead_radio()
 
 				if("ghost_pda")
 					toggles ^= PREFTOGGLE_CHAT_GHOSTPDA

code/modules/client/preference/preferences.dm

@@ -410,7 +410,7 @@ GLOBAL_LIST_INIT(special_role_times, list( //minimum age (in days) for accounts
 				dat += "<b>Donator Publicity:</b> <a href='byond://?_src_=prefs;preference=donor_public'><b>[(toggles & PREFTOGGLE_DONATOR_PUBLIC) ? "Public" : "Hidden"]</b></a><br>"
 			dat += "<b>FPS:</b>	 <a href='byond://?_src_=prefs;preference=clientfps;task=input'>[clientfps]</a><br>"
 			dat += "<b>Ghost Ears:</b> <a href='byond://?_src_=prefs;preference=ghost_ears'><b>[(toggles & PREFTOGGLE_CHAT_GHOSTEARS) ? "All Speech" : "Nearest Creatures"]</b></a><br>"
-			dat += "<b>Ghost Radio:</b> <a href='byond://?_src_=prefs;preference=ghost_radio'><b>[(toggles & PREFTOGGLE_CHAT_GHOSTRADIO) ? "All Chatter" : "No Chatter"]</b></a><br>"
+			dat += "<b>Ghost Radio:</b> <a href='byond://?_src_=prefs;preference=ghost_radio'><b>[(toggles & PREFTOGGLE_CHAT_GHOSTRADIO) ? "All Chatter" : "Nearest Speakers"]</b></a><br>"
 			dat += "<b>Ghost Sight:</b> <a href='byond://?_src_=prefs;preference=ghost_sight'><b>[(toggles & PREFTOGGLE_CHAT_GHOSTSIGHT) ? "All Emotes" : "Nearest Creatures"]</b></a><br>"
 			dat += "<b>Ghost PDA:</b> <a href='byond://?_src_=prefs;preference=ghost_pda'><b>[(toggles & PREFTOGGLE_CHAT_GHOSTPDA) ? "All PDA Messages" : "No PDA Messages"]</b></a><br>"
 			if(check_rights(R_ADMIN,0))

code/modules/client/preference/preferences_toggles.dm

@@ -65,20 +65,14 @@
 
 /datum/preference_toggle/toggle_ghost_radio
 	name = "Toggle Ghost Radio"
-	description = "Toggle between hearing all radio chatter, or only from nobody"
+	description = "Toggle between hearing all radio chatter, or only from nearby speakers"
 	preftoggle_bitflag = PREFTOGGLE_CHAT_GHOSTRADIO
 	preftoggle_toggle = PREFTOGGLE_TOGGLE1
 	preftoggle_category = PREFTOGGLE_CATEGORY_GHOST
-	enable_message = "As a ghost, you will now hear all radio chat in the world."
-	disable_message = "As a ghost, you will now hear no radio chat."
+	enable_message = "As a ghost, you will now only hear from nearby speakers."
+	disable_message = "As a ghost, you will now hear all radio chat in the world."
 	blackbox_message = "Toggle GhostRadio"
 
-/datum/preference_toggle/toggle_ghost_radio/set_toggles(client/user)
-	. = ..()
-	if(isobserver(user.mob))
-		var/mob/dead/observer/dead_dude = user.mob
-		dead_dude.update_dead_radio()
-
 /datum/preference_toggle/toggle_admin_radio
 	name = "Admin Radio"
 	description = "Toggle seeing radiochatter from radios and speakers"

code/modules/mob/dead/observer/observer_base.dm

@@ -952,11 +952,5 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 		log_debug("[key_name(src)] ended up in regular cleanup_observe rather than the mentor cleanup observe despite having TRAIT_MENTOR_OBSERVING. This is likely a bug and may result in them being stuck outside of their bodies.")
 	cleanup_observe()
 
-/mob/dead/observer/proc/update_dead_radio()
-	if(get_preference(PREFTOGGLE_CHAT_GHOSTRADIO))
-		GLOB.deadchat_radio.listeners |= src
-	else
-		GLOB.deadchat_radio.listeners -= src
-
 #undef GHOST_CAN_REENTER
 #undef GHOST_IS_OBSERVER

code/modules/mob/dead/observer/observer_login.dm

@@ -10,5 +10,3 @@
 	if(GLOB.non_respawnable_keys[ckey])
 		can_reenter_corpse = 0
 		REMOVE_TRAIT(src, TRAIT_RESPAWNABLE, GHOSTED)
-	
-	update_dead_radio()