Moves mutes to a GLOB

code/modules/client/client_procs.dm

@@ -113,7 +113,7 @@
 		if(!holder && received_discord_pm < world.time - 6000) // Worse they can do is spam discord for 10 minutes
 			to_chat(usr, "<span class='warning'>You are no longer able to use this, it's been more then 10 minutes since an admin on Discord has responded to you</span>")
 			return
-		if(prefs.muted & MUTE_ADMINHELP)
+		if(check_mute(ckey, MUTE_ADMINHELP))
 			to_chat(usr, "<span class='warning'>You cannot use this as your client has been muted from sending messages to the admins on Discord</span>")
 			return
 		cmd_admin_discord_pm()

code/modules/client/preference/preferences.dm

@@ -71,7 +71,6 @@ GLOBAL_LIST_INIT(special_role_times, list( //minimum age (in days) for accounts
 	var/max_gear_slots = 0
 
 	//non-preference stuff
-	var/muted = 0
 	var/last_ip
 	var/last_id