Clean up Client - visibleWorlds & canRequestCharlist

canRequestCharlist is a relic from the past when "View all char"
functionality was hacked together with wrong packets.

visibleWorlds I'm less sure about. I suppose it's useful if you add world
(via command) while someone is still on the login screen.
But the functionality of adding/removing worlds live is a recipe for disaster
and will eventually (likely) be removed.

src/main/java/net/server/Server.java

@@ -1497,11 +1497,8 @@ public class Server {
         }
     }
 
-    public SortedMap<Integer, List<Character>> loadAccountCharlist(int accountId, int visibleWorlds) {
+    public SortedMap<Integer, List<Character>> loadAccountCharlist(int accountId) {
         List<World> worlds = this.getWorlds();
-        if (worlds.size() > visibleWorlds) {
-            worlds = worlds.subList(0, visibleWorlds);
-        }
 
         SortedMap<Integer, List<Character>> worldChrs = new TreeMap<>();
         int chrTotal = 0;