Core/Commands: Remove the option to teleport to "startzone" with .unstuck command

Port From (https://github.com/TrinityCore/TrinityCore/commit/f6f2de76c79e8de7aba85ea5ebbe6450b2c04585)

Source/Game/Chat/Commands/MiscCommands.cs

@@ -2373,12 +2373,6 @@ namespace Game.Chat
                 return true;
             }
 
-            if (location_str == "startzone")
-            {
-                player.TeleportTo(player.GetStartPosition());
-                return true;
-            }
-
             //Not a supported argument
             return false;
         }

Source/Game/Entities/Player/Player.cs

@@ -1857,14 +1857,6 @@ namespace Game.Entities
             ScheduleDelayedOperation(PlayerDelayedOperations.BGGroupRestore);
             return TeleportTo(m_bgData.joinPos);
         }
-        public WorldLocation GetStartPosition()
-        {
-            PlayerInfo info = Global.ObjectMgr.GetPlayerInfo(GetRace(), GetClass());
-            uint mapId = info.MapId;
-            if (GetClass() == Class.Deathknight && HasSpell(50977))
-                mapId = 0;
-            return new WorldLocation(mapId, info.PositionX, info.PositionY, info.PositionZ, 0);
-        }
 
         public uint GetStartLevel(Race race, Class playerClass, Optional<uint> characterTemplateId = default)
         {